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/>.
20 * @file namestore/gnunet-service-namestore.c
21 * @brief namestore for the GNUnet naming system
22 * @author Matthias Wachs
23 * @author Christian Grothoff
26 * - run testcases, make sure everything works!
29 #include "gnunet_util_lib.h"
30 #include "gnunet_dnsparser_lib.h"
31 #include "gnunet_gns_service.h"
32 #include "gnunet_namecache_service.h"
33 #include "gnunet_namestore_service.h"
34 #include "gnunet_namestore_plugin.h"
35 #include "gnunet_statistics_service.h"
36 #include "gnunet_signatures.h"
37 #include "namestore.h"
39 #define LOG_STRERROR_FILE(kind,syscall,filename) 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
50 struct NamestoreClient;
54 * A namestore iteration operation.
59 * Next element in the DLL
61 struct ZoneIteration *next;
64 * Previous element in the DLL
66 struct ZoneIteration *prev;
69 * Namestore client which intiated this zone iteration
71 struct NamestoreClient *nc;
74 * The nick to add to the records
76 struct GNUNET_GNSRECORD_Data *nick;
79 * Key of the zone we are iterating over.
81 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
84 * Last sequence number in the zone iteration used to address next
85 * result of the zone iteration in the store
88 * Updated in #zone_iterate_proc()
93 * The operation id fot the zone iteration in the response for the client
98 * Offset of the zone iteration used to address next result of the zone
99 * iteration in the store
101 * Initialy set to 0 in #handle_iteration_start
102 * Incremented with by every call to #handle_iteration_next
112 struct NamestoreClient
118 struct GNUNET_SERVICE_Client *client;
121 * Message queue for transmission to @e client
123 struct GNUNET_MQ_Handle *mq;
127 * Zone iteration operations in progress initiated by this client
129 struct ZoneIteration *op_head;
133 * Zone iteration operations in progress initiated by this client
135 struct ZoneIteration *op_tail;
140 * A namestore monitor.
145 * Next element in the DLL
147 struct ZoneMonitor *next;
150 * Previous element in the DLL
152 struct ZoneMonitor *prev;
155 * Namestore client which intiated this zone monitor
157 struct NamestoreClient *nc;
160 * Private key of the zone.
162 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
165 * Task active during initial iteration.
167 struct GNUNET_SCHEDULER_Task *task;
170 * Task to warn about slow monitors.
172 struct GNUNET_SCHEDULER_Task *sa_wait_warning;
175 * Since when are we blocked on this monitor?
177 struct GNUNET_TIME_Absolute sa_waiting_start;
180 * Last sequence number in the zone iteration used to address next
181 * result of the zone iteration in the store
184 * Updated in #monitor_iterate_cb()
189 * Current limit of how many more messages we are allowed
190 * to queue to this monitor.
195 * How many more requests may we receive from the iterator
196 * before it is at the limit we gave it? Will be below or
197 * equal to @e limit. The effective limit for monitor
198 * events is thus @e iteration_cnt - @e limit!
200 uint64_t iteration_cnt;
203 * Are we (still) in the initial iteration pass?
205 int in_first_iteration;
208 * Is there a store activity waiting for this monitor? We only raise the
209 * flag when it happens and search the DLL for the store activity when we
210 * had a limit increase. If we cannot find any waiting store activity at
211 * that time, we clear the flag again.
219 * Pending operation on the namecache.
221 struct CacheOperation
227 struct CacheOperation *prev;
232 struct CacheOperation *next;
235 * Handle to namecache queue.
237 struct GNUNET_NAMECACHE_QueueEntry *qe;
240 * Client to notify about the result.
242 struct NamestoreClient *nc;
245 * Client's request ID.
252 * Information for an ongoing #handle_record_store() operation.
253 * Needed as we may wait for monitors to be ready for the notification.
260 struct StoreActivity *next;
265 struct StoreActivity *prev;
268 * Which client triggered the store activity?
270 struct NamestoreClient *nc;
273 * Copy of the original store message (as data fields in @e rd will
276 const struct RecordStoreMessage *rsm;
279 * Next zone monitor that still needs to be notified about this PUT.
281 struct ZoneMonitor *zm_pos;
284 * Label nicely canonicalized (lower case).
292 * Public key of all zeros.
294 static const struct GNUNET_CRYPTO_EcdsaPrivateKey zero;
297 * Configuration handle.
299 static const struct GNUNET_CONFIGURATION_Handle *GSN_cfg;
302 * Handle to the statistics service
304 static struct GNUNET_STATISTICS_Handle *statistics;
309 static struct GNUNET_NAMECACHE_Handle *namecache;
314 static struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
317 * Name of the database plugin
319 static char *db_lib_name;
324 static struct CacheOperation *cop_head;
329 static struct CacheOperation *cop_tail;
332 * First active zone monitor.
334 static struct ZoneMonitor *monitor_head;
337 * Last active zone monitor.
339 static struct ZoneMonitor *monitor_tail;
342 * Head of DLL of monitor-blocked store activities.
344 static struct StoreActivity *sa_head;
347 * Tail of DLL of monitor-blocked store activities.
349 static struct StoreActivity *sa_tail;
352 * Notification context shared by all monitors.
354 static struct GNUNET_NotificationContext *monitor_nc;
357 * Optimize block insertion by caching map of private keys to
358 * public keys in memory?
360 static int cache_keys;
363 * Use the namecache? Doing so creates additional cryptographic
364 * operations whenever we touch a record.
366 static int disable_namecache;
370 * Task run during shutdown.
375 cleanup_task (void *cls)
377 struct CacheOperation *cop;
380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
381 "Stopping namestore service\n");
382 while (NULL != (cop = cop_head))
384 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
385 "Aborting incomplete namecache operation\n");
386 GNUNET_NAMECACHE_cancel (cop->qe);
387 GNUNET_CONTAINER_DLL_remove (cop_head,
392 if (NULL != namecache)
394 GNUNET_NAMECACHE_disconnect (namecache);
397 GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name,
399 GNUNET_free (db_lib_name);
401 if (NULL != monitor_nc)
403 GNUNET_notification_context_destroy (monitor_nc);
406 if (NULL != statistics)
408 GNUNET_STATISTICS_destroy (statistics,
416 * Release memory used by @a sa.
418 * @param sa activity to free
421 free_store_activity (struct StoreActivity *sa)
423 GNUNET_CONTAINER_DLL_remove (sa_head,
426 GNUNET_free (sa->conv_name);
432 * Function called with the records for the #GNUNET_GNS_EMPTY_LABEL_AT
433 * label in the zone. Used to locate the #GNUNET_GNSRECORD_TYPE_NICK
434 * record, which (if found) is then copied to @a cls for future use.
436 * @param cls a `struct GNUNET_GNSRECORD_Data **` for storing the nick (if found)
437 * @param seq sequence number of the record
438 * @param private_key the private key of the zone (unused)
439 * @param label should be #GNUNET_GNS_EMPTY_LABEL_AT
440 * @param rd_count number of records in @a rd
441 * @param rd records stored under @a label in the zone
444 lookup_nick_it (void *cls,
446 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
448 unsigned int rd_count,
449 const struct GNUNET_GNSRECORD_Data *rd)
451 struct GNUNET_GNSRECORD_Data **res = cls;
455 if (0 != strcmp (label, GNUNET_GNS_EMPTY_LABEL_AT))
460 for (unsigned int c = 0; c < rd_count; c++)
462 if (GNUNET_GNSRECORD_TYPE_NICK == rd[c].record_type)
464 (*res) = GNUNET_malloc (rd[c].data_size + sizeof (struct GNUNET_GNSRECORD_Data));
465 (*res)->data = &(*res)[1];
466 GNUNET_memcpy ((void *) (*res)->data,
469 (*res)->data_size = rd[c].data_size;
470 (*res)->expiration_time = rd[c].expiration_time;
471 (*res)->flags = rd[c].flags;
472 (*res)->record_type = GNUNET_GNSRECORD_TYPE_NICK;
481 * Return the NICK record for the zone (if it exists).
483 * @param zone private key for the zone to look for nick
484 * @return NULL if no NICK record was found
486 static struct GNUNET_GNSRECORD_Data *
487 get_nick_record (const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone)
489 struct GNUNET_CRYPTO_EcdsaPublicKey pub;
490 struct GNUNET_GNSRECORD_Data *nick;
494 res = GSN_database->lookup_records (GSN_database->cls,
496 GNUNET_GNS_EMPTY_LABEL_AT,
499 if ( (GNUNET_OK != res) ||
502 GNUNET_CRYPTO_ecdsa_key_get_public (zone, &pub);
503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
504 "No nick name set for zone `%s'\n",
505 GNUNET_GNSRECORD_z2s (&pub));
513 * Merge the nick record @a nick_rd with the rest of the
514 * record set given in @a rd2. Store the result in @a rdc_res
515 * and @a rd_res. The @a nick_rd's expiration time is set to
516 * the maximum expiration time of all of the records in @a rd2.
518 * @param nick_rd the nick record to integrate
519 * @param rd2_length length of the @a rd2 array
520 * @param rd2 array of records
521 * @param rdc_res[out] length of the resulting @a rd_res array
522 * @param rd_res[out] set to an array of records,
523 * including @a nick_rd and @a rd2;
524 * all of the variable-size 'data' fields in @a rd2 are
525 * allocated in the same chunk of memory!
528 merge_with_nick_records (const struct GNUNET_GNSRECORD_Data *nick_rd,
529 unsigned int rd2_length,
530 const struct GNUNET_GNSRECORD_Data *rd2,
531 unsigned int *rdc_res,
532 struct GNUNET_GNSRECORD_Data **rd_res)
534 uint64_t latest_expiration;
538 struct GNUNET_GNSRECORD_Data *target;
540 (*rdc_res) = 1 + rd2_length;
541 if (0 == 1 + rd2_length)
547 req = sizeof (struct GNUNET_GNSRECORD_Data) + nick_rd->data_size;
548 for (unsigned int i=0; i<rd2_length; i++)
550 const struct GNUNET_GNSRECORD_Data *orig = &rd2[i];
552 if (req + sizeof (struct GNUNET_GNSRECORD_Data) + orig->data_size < req)
558 req += sizeof (struct GNUNET_GNSRECORD_Data) + orig->data_size;
560 target = GNUNET_malloc (req);
562 data = (char *) &target[1 + rd2_length];
564 latest_expiration = 0;
565 for (unsigned int i=0;i<rd2_length;i++)
567 const struct GNUNET_GNSRECORD_Data *orig = &rd2[i];
569 if (0 != (orig->flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
571 if ((GNUNET_TIME_absolute_get().abs_value_us + orig->expiration_time) >
573 latest_expiration = orig->expiration_time;
575 else if (orig->expiration_time > latest_expiration)
576 latest_expiration = orig->expiration_time;
578 target[i].data = (void *) &data[data_offset];
579 GNUNET_memcpy (&data[data_offset],
582 data_offset += orig->data_size;
585 target[rd2_length] = *nick_rd;
586 target[rd2_length].expiration_time = latest_expiration;
587 target[rd2_length].data = (void *) &data[data_offset];
588 GNUNET_memcpy (&data[data_offset],
591 data_offset += nick_rd->data_size;
592 GNUNET_assert (req ==
593 (sizeof (struct GNUNET_GNSRECORD_Data)) * (*rdc_res) + data_offset);
598 * Generate a `struct LookupNameResponseMessage` and send it to the
599 * given client using the given notification context.
601 * @param nc client to unicast to
602 * @param request_id request ID to use
603 * @param zone_key zone key of the zone
605 * @param rd_count number of records in @a rd
606 * @param rd array of records
609 send_lookup_response (struct NamestoreClient *nc,
611 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
613 unsigned int rd_count,
614 const struct GNUNET_GNSRECORD_Data *rd)
616 struct GNUNET_MQ_Envelope *env;
617 struct RecordResultMessage *zir_msg;
618 struct GNUNET_GNSRECORD_Data *nick;
619 struct GNUNET_GNSRECORD_Data *res;
620 unsigned int res_count;
626 nick = get_nick_record (zone_key);
629 GNUNET_GNSRECORD_records_get_size (rd_count,
632 if ( (NULL != nick) &&
634 GNUNET_GNS_EMPTY_LABEL_AT)))
636 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
637 merge_with_nick_records (nick,
646 res_count = rd_count;
647 res = (struct GNUNET_GNSRECORD_Data *) rd;
651 GNUNET_GNSRECORD_records_get_size (res_count,
655 name_len = strlen (name) + 1;
656 rd_ser_len = GNUNET_GNSRECORD_records_get_size (res_count,
661 GNUNET_SERVICE_client_drop (nc->client);
664 if (rd_ser_len >= UINT16_MAX - name_len - sizeof (*zir_msg))
667 GNUNET_SERVICE_client_drop (nc->client);
670 env = GNUNET_MQ_msg_extra (zir_msg,
671 name_len + rd_ser_len,
672 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
673 zir_msg->gns_header.r_id = htonl (request_id);
674 zir_msg->name_len = htons (name_len);
675 zir_msg->rd_count = htons (res_count);
676 zir_msg->rd_len = htons ((uint16_t) rd_ser_len);
677 zir_msg->private_key = *zone_key;
678 name_tmp = (char *) &zir_msg[1];
679 GNUNET_memcpy (name_tmp,
682 rd_ser = &name_tmp[name_len];
683 GNUNET_assert (rd_ser_len ==
684 GNUNET_GNSRECORD_records_serialize (res_count,
688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
689 "Sending RECORD_RESULT message with %u records\n",
691 GNUNET_STATISTICS_update (statistics,
692 "Record sets sent to clients",
695 GNUNET_MQ_send (nc->mq,
703 * Send response to the store request to the client.
705 * @param client client to talk to
706 * @param res status of the operation
707 * @param rid client's request ID
710 send_store_response (struct NamestoreClient *nc,
714 struct GNUNET_MQ_Envelope *env;
715 struct RecordStoreResponseMessage *rcr_msg;
717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
718 "Sending RECORD_STORE_RESPONSE message\n");
719 GNUNET_STATISTICS_update (statistics,
720 "Store requests completed",
723 env = GNUNET_MQ_msg (rcr_msg,
724 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE_RESPONSE);
725 rcr_msg->gns_header.r_id = htonl (rid);
726 rcr_msg->op_result = htonl (res);
727 GNUNET_MQ_send (nc->mq,
733 * Cache operation complete, clean up.
735 * @param cls the `struct CacheOperation`
736 * @param success success
737 * @param emsg error messages
740 finish_cache_operation (void *cls,
744 struct CacheOperation *cop = cls;
747 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
748 _("Failed to replicate block in namecache: %s\n"),
751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
752 "CACHE operation completed\n");
753 GNUNET_CONTAINER_DLL_remove (cop_head,
757 send_store_response (cop->nc,
765 * We just touched the plaintext information about a name in our zone;
766 * refresh the corresponding (encrypted) block in the namecache.
768 * @param nc client responsible for the request, can be NULL
769 * @param rid request ID of the client
770 * @param zone_key private key of the zone
771 * @param name label for the records
772 * @param rd_count number of records
773 * @param rd records stored under the given @a name
776 refresh_block (struct NamestoreClient *nc,
778 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
780 unsigned int rd_count,
781 const struct GNUNET_GNSRECORD_Data *rd)
783 struct GNUNET_GNSRECORD_Block *block;
784 struct CacheOperation *cop;
785 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
786 struct GNUNET_GNSRECORD_Data *nick;
787 struct GNUNET_GNSRECORD_Data *res;
788 unsigned int res_count;
789 struct GNUNET_TIME_Absolute exp_time;
791 nick = get_nick_record (zone_key);
792 res_count = rd_count;
793 res = (struct GNUNET_GNSRECORD_Data *) rd; /* fixme: a bit unclean... */
796 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
797 merge_with_nick_records (nick,
805 send_store_response (nc,
808 return; /* no data, no need to update cache */
810 if (GNUNET_YES == disable_namecache)
812 GNUNET_STATISTICS_update (statistics,
813 "Namecache updates skipped (NC disabled)",
816 send_store_response (nc,
821 exp_time = GNUNET_GNSRECORD_record_get_expiration_time (res_count,
824 block = GNUNET_GNSRECORD_block_create2 (zone_key,
830 block = GNUNET_GNSRECORD_block_create (zone_key,
835 GNUNET_assert (NULL != block);
836 GNUNET_CRYPTO_ecdsa_key_get_public (zone_key,
838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
839 "Caching block for label `%s' with %u records and expiration %s in zone `%s' in namecache\n",
842 GNUNET_STRINGS_absolute_time_to_string (exp_time),
843 GNUNET_GNSRECORD_z2s (&pkey));
844 GNUNET_STATISTICS_update (statistics,
845 "Namecache updates pushed",
848 cop = GNUNET_new (struct CacheOperation);
851 GNUNET_CONTAINER_DLL_insert (cop_head,
854 cop->qe = GNUNET_NAMECACHE_block_cache (namecache,
856 &finish_cache_operation,
863 * Print a warning that one of our monitors is no longer reacting.
865 * @param cls a `struct ZoneMonitor` to warn about
868 warn_monitor_slow (void *cls)
870 struct ZoneMonitor *zm = cls;
872 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
873 "No response from monitor since %s\n",
874 GNUNET_STRINGS_absolute_time_to_string (zm->sa_waiting_start));
875 zm->sa_wait_warning = GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
882 * Continue processing the @a sa.
884 * @param sa store activity to process
887 continue_store_activity (struct StoreActivity *sa)
889 const struct RecordStoreMessage *rp_msg = sa->rsm;
890 unsigned int rd_count;
894 const char *name_tmp;
897 rid = ntohl (rp_msg->gns_header.r_id);
898 name_len = ntohs (rp_msg->name_len);
899 rd_count = ntohs (rp_msg->rd_count);
900 rd_ser_len = ntohs (rp_msg->rd_len);
901 name_tmp = (const char *) &rp_msg[1];
902 rd_ser = &name_tmp[name_len];
904 struct GNUNET_GNSRECORD_Data rd[GNUNET_NZL(rd_count)];
906 /* We did this before, must succeed again */
907 GNUNET_assert (GNUNET_OK ==
908 GNUNET_GNSRECORD_records_deserialize (rd_ser_len,
913 for (struct ZoneMonitor *zm = sa->zm_pos;
917 if ( (0 != memcmp (&rp_msg->private_key,
919 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) &&
920 (0 != memcmp (&zm->zone,
922 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) )
923 sa->zm_pos = zm->next; /* not interesting to this monitor */
924 if (zm->limit == zm->iteration_cnt)
926 zm->sa_waiting = GNUNET_YES;
927 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
928 if (NULL != zm->sa_wait_warning)
929 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
930 zm->sa_wait_warning = GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
933 return; /* blocked on zone monitor */
935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
936 "Notifying monitor about changes under label `%s'\n",
939 send_lookup_response (zm->nc,
941 &rp_msg->private_key,
945 sa->zm_pos = zm->next;
947 /* great, done with the monitors, unpack (again) for refresh_block operation */
948 refresh_block (sa->nc,
950 &rp_msg->private_key,
955 GNUNET_SERVICE_client_continue (sa->nc->client);
956 free_store_activity (sa);
961 * Called whenever a client is disconnected.
962 * Frees our resources associated with that client.
965 * @param client identification of the client
966 * @param app_ctx the `struct NamestoreClient` of @a client
969 client_disconnect_cb (void *cls,
970 struct GNUNET_SERVICE_Client *client,
973 struct NamestoreClient *nc = app_ctx;
974 struct ZoneIteration *no;
975 struct CacheOperation *cop;
978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
979 "Client %p disconnected\n",
981 for (struct ZoneMonitor *zm = monitor_head; NULL != zm; zm = zm->next)
983 struct StoreActivity *san;
987 GNUNET_CONTAINER_DLL_remove (monitor_head,
990 if (NULL != zm->task)
992 GNUNET_SCHEDULER_cancel (zm->task);
995 if (NULL != zm->sa_wait_warning)
997 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
998 zm->sa_wait_warning = NULL;
1000 for (struct StoreActivity *sa = sa_head; NULL != sa; sa = san)
1003 if (zm == sa->zm_pos)
1005 sa->zm_pos = zm->next;
1006 /* this may free sa */
1007 continue_store_activity (sa);
1013 for (struct StoreActivity *sa = sa_head; NULL != sa; sa = sa->next)
1017 /* this may free sa */
1018 free_store_activity (sa);
1019 break; /* there can only be one per nc */
1022 while (NULL != (no = nc->op_head))
1024 GNUNET_CONTAINER_DLL_remove (nc->op_head,
1029 for (cop = cop_head; NULL != cop; cop = cop->next)
1037 * Add a client to our list of active clients.
1040 * @param client client to add
1041 * @param mq message queue for @a client
1042 * @return internal namestore client structure for this client
1045 client_connect_cb (void *cls,
1046 struct GNUNET_SERVICE_Client *client,
1047 struct GNUNET_MQ_Handle *mq)
1049 struct NamestoreClient *nc;
1052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1053 "Client %p connected\n",
1055 nc = GNUNET_new (struct NamestoreClient);
1056 nc->client = client;
1063 * Closure for #lookup_it().
1065 struct RecordLookupContext
1081 struct GNUNET_GNSRECORD_Data *nick;
1091 unsigned int res_rd_count;
1103 * @param seq sequence number of the record
1106 lookup_it (void *cls,
1108 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
1110 unsigned int rd_count,
1111 const struct GNUNET_GNSRECORD_Data *rd)
1113 struct RecordLookupContext *rlc = cls;
1117 if (0 != strcmp (label,
1120 rlc->found = GNUNET_YES;
1123 rlc->rd_ser_len = 0;
1124 rlc->res_rd_count = 0;
1128 if ( (NULL != rlc->nick) &&
1129 (0 != strcmp (label,
1130 GNUNET_GNS_EMPTY_LABEL_AT)) )
1133 struct GNUNET_GNSRECORD_Data *rd_res;
1134 unsigned int rdc_res;
1138 rlc->nick->flags = (rlc->nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
1139 merge_with_nick_records (rlc->nick,
1144 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rdc_res,
1146 if (rlc->rd_ser_len < 0)
1149 GNUNET_free (rd_res);
1150 rlc->found = GNUNET_NO;
1151 rlc->rd_ser_len = 0;
1154 rlc->res_rd_count = rdc_res;
1155 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
1156 if (rlc->rd_ser_len !=
1157 GNUNET_GNSRECORD_records_serialize (rdc_res,
1163 GNUNET_free (rlc->res_rd);
1165 rlc->res_rd_count = 0;
1166 rlc->rd_ser_len = 0;
1167 GNUNET_free (rd_res);
1168 rlc->found = GNUNET_NO;
1171 GNUNET_free (rd_res);
1172 GNUNET_free (rlc->nick);
1177 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count,
1179 if (rlc->rd_ser_len < 0)
1182 rlc->found = GNUNET_NO;
1183 rlc->rd_ser_len = 0;
1186 rlc->res_rd_count = rd_count;
1187 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
1188 if (rlc->rd_ser_len !=
1189 GNUNET_GNSRECORD_records_serialize (rd_count,
1195 GNUNET_free (rlc->res_rd);
1197 rlc->res_rd_count = 0;
1198 rlc->rd_ser_len = 0;
1199 rlc->found = GNUNET_NO;
1207 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
1209 * @param cls client sending the message
1210 * @param ll_msg message of type `struct LabelLookupMessage`
1211 * @return #GNUNET_OK if @a ll_msg is well-formed
1214 check_record_lookup (void *cls,
1215 const struct LabelLookupMessage *ll_msg)
1219 const char *name_tmp;
1222 name_len = ntohl (ll_msg->label_len);
1223 src_size = ntohs (ll_msg->gns_header.header.size);
1224 if (name_len != src_size - sizeof (struct LabelLookupMessage))
1227 return GNUNET_SYSERR;
1230 name_tmp = (const char *) &ll_msg[1];
1231 if ('\0' != name_tmp[name_len -1])
1234 return GNUNET_SYSERR;
1241 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
1243 * @param cls client sending the message
1244 * @param ll_msg message of type `struct LabelLookupMessage`
1247 handle_record_lookup (void *cls,
1248 const struct LabelLookupMessage *ll_msg)
1250 struct NamestoreClient *nc = cls;
1251 struct GNUNET_MQ_Envelope *env;
1252 struct LabelLookupResponseMessage *llr_msg;
1253 struct RecordLookupContext rlc;
1254 const char *name_tmp;
1260 name_len = ntohl (ll_msg->label_len);
1261 name_tmp = (const char *) &ll_msg[1];
1262 GNUNET_SERVICE_client_continue (nc->client);
1263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1264 "Received NAMESTORE_RECORD_LOOKUP message for name `%s'\n",
1267 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
1268 if (NULL == conv_name)
1270 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1271 "Error converting name `%s'\n",
1273 GNUNET_SERVICE_client_drop (nc->client);
1276 rlc.label = conv_name;
1277 rlc.found = GNUNET_NO;
1278 rlc.res_rd_count = 0;
1281 rlc.nick = get_nick_record (&ll_msg->zone);
1282 res = GSN_database->lookup_records (GSN_database->cls,
1287 GNUNET_free (conv_name);
1288 env = GNUNET_MQ_msg_extra (llr_msg,
1289 name_len + rlc.rd_ser_len,
1290 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP_RESPONSE);
1291 llr_msg->gns_header.r_id = ll_msg->gns_header.r_id;
1292 llr_msg->private_key = ll_msg->zone;
1293 llr_msg->name_len = htons (name_len);
1294 llr_msg->rd_count = htons (rlc.res_rd_count);
1295 llr_msg->rd_len = htons (rlc.rd_ser_len);
1296 res_name = (char *) &llr_msg[1];
1297 if ((GNUNET_YES == rlc.found) && (GNUNET_OK == res))
1298 llr_msg->found = ntohs (GNUNET_YES);
1300 llr_msg->found = ntohs (GNUNET_NO);
1301 GNUNET_memcpy (&llr_msg[1],
1304 GNUNET_memcpy (&res_name[name_len],
1307 GNUNET_MQ_send (nc->mq,
1309 GNUNET_free_non_null (rlc.res_rd);
1314 * Checks a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
1316 * @param cls client sending the message
1317 * @param rp_msg message of type `struct RecordStoreMessage`
1318 * @return #GNUNET_OK if @a rp_msg is well-formed
1321 check_record_store (void *cls,
1322 const struct RecordStoreMessage *rp_msg)
1326 size_t msg_size_exp;
1328 const char *name_tmp;
1331 name_len = ntohs (rp_msg->name_len);
1332 msg_size = ntohs (rp_msg->gns_header.header.size);
1333 rd_ser_len = ntohs (rp_msg->rd_len);
1334 msg_size_exp = sizeof (struct RecordStoreMessage) + name_len + rd_ser_len;
1335 if (msg_size != msg_size_exp)
1338 return GNUNET_SYSERR;
1340 if ( (0 == name_len) ||
1341 (name_len > MAX_NAME_LEN) )
1344 return GNUNET_SYSERR;
1346 name_tmp = (const char *) &rp_msg[1];
1347 if ('\0' != name_tmp[name_len -1])
1350 return GNUNET_SYSERR;
1357 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
1359 * @param cls client sending the message
1360 * @param rp_msg message of type `struct RecordStoreMessage`
1363 handle_record_store (void *cls,
1364 const struct RecordStoreMessage *rp_msg)
1366 struct NamestoreClient *nc = cls;
1370 const char *name_tmp;
1373 unsigned int rd_count;
1375 struct StoreActivity *sa;
1377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1378 "Received NAMESTORE_RECORD_STORE message\n");
1379 rid = ntohl (rp_msg->gns_header.r_id);
1380 name_len = ntohs (rp_msg->name_len);
1381 rd_count = ntohs (rp_msg->rd_count);
1382 rd_ser_len = ntohs (rp_msg->rd_len);
1383 GNUNET_break (0 == ntohs (rp_msg->reserved));
1384 name_tmp = (const char *) &rp_msg[1];
1385 rd_ser = &name_tmp[name_len];
1387 struct GNUNET_GNSRECORD_Data rd[GNUNET_NZL(rd_count)];
1390 GNUNET_GNSRECORD_records_deserialize (rd_ser_len,
1396 GNUNET_SERVICE_client_drop (nc->client);
1400 /* Extracting and converting private key */
1401 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
1402 if (NULL == conv_name)
1404 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1405 "Error converting name `%s'\n",
1407 GNUNET_SERVICE_client_drop (nc->client);
1410 GNUNET_STATISTICS_update (statistics,
1411 "Well-formed store requests received",
1414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1415 "Creating %u records for name `%s'\n",
1416 (unsigned int) rd_count,
1418 if ( (0 == rd_count) &&
1420 GSN_database->lookup_records (GSN_database->cls,
1421 &rp_msg->private_key,
1426 /* This name does not exist, so cannot be removed */
1427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1428 "Name `%s' does not exist, no deletion required\n",
1434 /* remove "NICK" records, unless this is for the
1435 #GNUNET_GNS_EMPTY_LABEL_AT label */
1436 struct GNUNET_GNSRECORD_Data rd_clean[GNUNET_NZL(rd_count)];
1437 unsigned int rd_clean_off;
1440 for (unsigned int i=0;i<rd_count;i++)
1442 rd_clean[rd_clean_off] = rd[i];
1443 if ( (0 == strcmp (GNUNET_GNS_EMPTY_LABEL_AT,
1445 (GNUNET_GNSRECORD_TYPE_NICK != rd[i].record_type) )
1448 res = GSN_database->store_records (GSN_database->cls,
1449 &rp_msg->private_key,
1455 if (GNUNET_OK != res)
1457 /* store not successful, not need to tell monitors */
1458 send_store_response (nc,
1461 GNUNET_SERVICE_client_continue (nc->client);
1462 GNUNET_free (conv_name);
1466 sa = GNUNET_malloc (sizeof (struct StoreActivity) +
1467 ntohs (rp_msg->gns_header.header.size));
1468 GNUNET_CONTAINER_DLL_insert (sa_head,
1472 sa->rsm = (const struct RecordStoreMessage *) &sa[1];
1473 GNUNET_memcpy (&sa[1],
1475 ntohs (rp_msg->gns_header.header.size));
1476 sa->zm_pos = monitor_head;
1477 sa->conv_name = conv_name;
1478 continue_store_activity (sa);
1484 * Context for record remove operations passed from #handle_zone_to_name to
1485 * #handle_zone_to_name_it as closure
1487 struct ZoneToNameCtx
1492 struct NamestoreClient *nc;
1495 * Request id (to be used in the response to the client).
1500 * Set to #GNUNET_OK on success, #GNUNET_SYSERR on error. Note that
1501 * not finding a name for the zone still counts as a 'success' here,
1502 * as this field is about the success of executing the IPC protocol.
1509 * Zone to name iterator
1511 * @param cls struct ZoneToNameCtx *
1512 * @param seq sequence number of the record
1513 * @param zone_key the zone key
1515 * @param rd_count number of records in @a rd
1516 * @param rd record data
1519 handle_zone_to_name_it (void *cls,
1521 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1523 unsigned int rd_count,
1524 const struct GNUNET_GNSRECORD_Data *rd)
1526 struct ZoneToNameCtx *ztn_ctx = cls;
1527 struct GNUNET_MQ_Envelope *env;
1528 struct ZoneToNameResponseMessage *ztnr_msg;
1537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1538 "Found result for zone-to-name lookup: `%s'\n",
1541 name_len = (NULL == name) ? 0 : strlen (name) + 1;
1542 rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count,
1547 ztn_ctx->success = GNUNET_SYSERR;
1550 msg_size = sizeof (struct ZoneToNameResponseMessage) + name_len + rd_ser_len;
1551 if (msg_size >= GNUNET_MAX_MESSAGE_SIZE)
1554 ztn_ctx->success = GNUNET_SYSERR;
1557 env = GNUNET_MQ_msg_extra (ztnr_msg,
1558 name_len + rd_ser_len,
1559 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1560 ztnr_msg->gns_header.header.size = htons (msg_size);
1561 ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
1562 ztnr_msg->res = htons (res);
1563 ztnr_msg->rd_len = htons (rd_ser_len);
1564 ztnr_msg->rd_count = htons (rd_count);
1565 ztnr_msg->name_len = htons (name_len);
1566 ztnr_msg->zone = *zone_key;
1567 name_tmp = (char *) &ztnr_msg[1];
1568 GNUNET_memcpy (name_tmp,
1571 rd_tmp = &name_tmp[name_len];
1572 GNUNET_assert (rd_ser_len ==
1573 GNUNET_GNSRECORD_records_serialize (rd_count,
1577 ztn_ctx->success = GNUNET_OK;
1578 GNUNET_MQ_send (ztn_ctx->nc->mq,
1584 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME message
1586 * @param cls client client sending the message
1587 * @param ztn_msg message of type 'struct ZoneToNameMessage'
1590 handle_zone_to_name (void *cls,
1591 const struct ZoneToNameMessage *ztn_msg)
1593 struct NamestoreClient *nc = cls;
1594 struct ZoneToNameCtx ztn_ctx;
1595 struct GNUNET_MQ_Envelope *env;
1596 struct ZoneToNameResponseMessage *ztnr_msg;
1598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1599 "Received ZONE_TO_NAME message\n");
1600 ztn_ctx.rid = ntohl (ztn_msg->gns_header.r_id);
1602 ztn_ctx.success = GNUNET_NO;
1603 if (GNUNET_SYSERR ==
1604 GSN_database->zone_to_name (GSN_database->cls,
1606 &ztn_msg->value_zone,
1607 &handle_zone_to_name_it, &ztn_ctx))
1609 /* internal error, hang up instead of signalling something
1610 that might be wrong */
1612 GNUNET_SERVICE_client_drop (nc->client);
1615 if (GNUNET_NO == ztn_ctx.success)
1617 /* no result found, send empty response */
1618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1619 "Found no result for zone-to-name lookup.\n");
1620 env = GNUNET_MQ_msg (ztnr_msg,
1621 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1622 ztnr_msg->gns_header.r_id = ztn_msg->gns_header.r_id;
1623 ztnr_msg->res = htons (GNUNET_NO);
1624 GNUNET_MQ_send (nc->mq,
1627 GNUNET_SERVICE_client_continue (nc->client);
1632 * Context for record remove operations passed from
1633 * #run_zone_iteration_round to #zone_iterate_proc as closure
1635 struct ZoneIterationProcResult
1638 * The zone iteration handle
1640 struct ZoneIteration *zi;
1643 * Number of results left to be returned in this iteration.
1651 * Process results for zone iteration from database
1653 * @param cls struct ZoneIterationProcResult
1654 * @param seq sequence number of the record
1655 * @param zone_key the zone key
1657 * @param rd_count number of records for this name
1658 * @param rd record data
1661 zone_iterate_proc (void *cls,
1663 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1665 unsigned int rd_count,
1666 const struct GNUNET_GNSRECORD_Data *rd)
1668 struct ZoneIterationProcResult *proc = cls;
1669 int do_refresh_block;
1671 if ( (NULL == zone_key) &&
1674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1675 "Iteration done\n");
1678 if ( (NULL == zone_key) ||
1681 /* what is this!? should never happen */
1685 if (0 == proc->limit)
1687 /* what is this!? should never happen */
1692 proc->zi->seq = seq;
1693 send_lookup_response (proc->zi->nc,
1694 proc->zi->request_id,
1699 do_refresh_block = GNUNET_NO;
1700 for (unsigned int i=0;i<rd_count;i++)
1701 if (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
1703 do_refresh_block = GNUNET_YES;
1706 if (GNUNET_YES == do_refresh_block)
1707 refresh_block (NULL,
1717 * Perform the next round of the zone iteration.
1719 * @param zi zone iterator to process
1720 * @param limit number of results to return in one pass
1723 run_zone_iteration_round (struct ZoneIteration *zi,
1726 struct ZoneIterationProcResult proc;
1727 struct GNUNET_MQ_Envelope *env;
1728 struct RecordResultMessage *rrm;
1729 struct GNUNET_TIME_Absolute start;
1730 struct GNUNET_TIME_Relative duration;
1735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1736 "Asked to return up to %llu records at position %llu\n",
1737 (unsigned long long) limit,
1738 (unsigned long long) zi->seq);
1741 start = GNUNET_TIME_absolute_get ();
1742 GNUNET_break (GNUNET_SYSERR !=
1743 GSN_database->iterate_records (GSN_database->cls,
1744 (0 == memcmp (&zi->zone,
1753 duration = GNUNET_TIME_absolute_get_duration (start);
1754 duration = GNUNET_TIME_relative_divide (duration,
1755 limit - proc.limit);
1756 GNUNET_STATISTICS_set (statistics,
1757 "NAMESTORE iteration delay (μs/record)",
1758 duration.rel_value_us,
1760 if (0 == proc.limit)
1762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1763 "Returned %llu results, more results available\n",
1764 (unsigned long long) limit);
1765 return; /* more results later after we get the
1766 #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message */
1768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1769 "Completed iteration after %llu/%llu results\n",
1770 (unsigned long long) (limit - proc.limit),
1771 (unsigned long long) limit);
1772 /* send empty response to indicate end of list */
1773 env = GNUNET_MQ_msg (rrm,
1774 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
1775 rrm->gns_header.r_id = htonl (zi->request_id);
1776 GNUNET_MQ_send (zi->nc->mq,
1778 GNUNET_CONTAINER_DLL_remove (zi->nc->op_head,
1786 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START message
1788 * @param cls the client sending the message
1789 * @param zis_msg message from the client
1792 handle_iteration_start (void *cls,
1793 const struct ZoneIterationStartMessage *zis_msg)
1795 struct NamestoreClient *nc = cls;
1796 struct ZoneIteration *zi;
1798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1799 "Received ZONE_ITERATION_START message\n");
1800 zi = GNUNET_new (struct ZoneIteration);
1801 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1804 zi->zone = zis_msg->zone;
1806 GNUNET_CONTAINER_DLL_insert (nc->op_head,
1809 run_zone_iteration_round (zi,
1811 GNUNET_SERVICE_client_continue (nc->client);
1816 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP message
1818 * @param cls the client sending the message
1819 * @param zis_msg message from the client
1822 handle_iteration_stop (void *cls,
1823 const struct ZoneIterationStopMessage *zis_msg)
1825 struct NamestoreClient *nc = cls;
1826 struct ZoneIteration *zi;
1829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1830 "Received ZONE_ITERATION_STOP message\n");
1831 rid = ntohl (zis_msg->gns_header.r_id);
1832 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1833 if (zi->request_id == rid)
1838 GNUNET_SERVICE_client_drop (nc->client);
1841 GNUNET_CONTAINER_DLL_remove (nc->op_head,
1845 GNUNET_SERVICE_client_continue (nc->client);
1850 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message
1852 * @param cls the client sending the message
1853 * @param message message from the client
1856 handle_iteration_next (void *cls,
1857 const struct ZoneIterationNextMessage *zis_msg)
1859 struct NamestoreClient *nc = cls;
1860 struct ZoneIteration *zi;
1864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1865 "Received ZONE_ITERATION_NEXT message\n");
1866 GNUNET_STATISTICS_update (statistics,
1867 "Iteration NEXT messages received",
1870 rid = ntohl (zis_msg->gns_header.r_id);
1871 limit = GNUNET_ntohll (zis_msg->limit);
1872 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1873 if (zi->request_id == rid)
1878 GNUNET_SERVICE_client_drop (nc->client);
1881 run_zone_iteration_round (zi,
1883 GNUNET_SERVICE_client_continue (nc->client);
1888 * Function called when the monitor is ready for more data, and we
1889 * should thus unblock PUT operations that were blocked on the
1890 * monitor not being ready.
1893 monitor_unblock (struct ZoneMonitor *zm)
1895 struct StoreActivity *sa = sa_head;
1897 while ( (NULL != sa) &&
1898 (zm->limit > zm->iteration_cnt) )
1900 struct StoreActivity *sn = sa->next;
1902 if (sa->zm_pos == zm)
1903 continue_store_activity (sa);
1906 if (zm->limit > zm->iteration_cnt)
1908 zm->sa_waiting = GNUNET_NO;
1909 if (NULL != zm->sa_wait_warning)
1911 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1912 zm->sa_wait_warning = NULL;
1915 else if (GNUNET_YES == zm->sa_waiting)
1917 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
1918 if (NULL != zm->sa_wait_warning)
1919 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1920 zm->sa_wait_warning = GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
1928 * Send 'sync' message to zone monitor, we're now in sync.
1930 * @param zm monitor that is now in sync
1933 monitor_sync (struct ZoneMonitor *zm)
1935 struct GNUNET_MQ_Envelope *env;
1936 struct GNUNET_MessageHeader *sync;
1938 env = GNUNET_MQ_msg (sync,
1939 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_SYNC);
1940 GNUNET_MQ_send (zm->nc->mq,
1942 /* mark iteration done */
1943 zm->in_first_iteration = GNUNET_NO;
1944 zm->iteration_cnt = 0;
1945 if ( (zm->limit > 0) &&
1947 monitor_unblock (zm);
1952 * Obtain the next datum during the zone monitor's zone initial iteration.
1954 * @param cls zone monitor that does its initial iteration
1957 monitor_iteration_next (void *cls);
1961 * A #GNUNET_NAMESTORE_RecordIterator for monitors.
1963 * @param cls a 'struct ZoneMonitor *' with information about the monitor
1964 * @param seq sequence number of the record
1965 * @param zone_key zone key of the zone
1967 * @param rd_count number of records in @a rd
1968 * @param rd array of records
1971 monitor_iterate_cb (void *cls,
1973 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1975 unsigned int rd_count,
1976 const struct GNUNET_GNSRECORD_Data *rd)
1978 struct ZoneMonitor *zm = cls;
1983 /* finished with iteration */
1987 GNUNET_STATISTICS_update (statistics,
1988 "Monitor notifications sent",
1992 zm->iteration_cnt--;
1993 send_lookup_response (zm->nc,
1999 if ( (0 == zm->iteration_cnt) &&
2002 /* We are done with the current iteration batch, AND the
2003 client would right now accept more, so go again! */
2004 GNUNET_assert (NULL == zm->task);
2005 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next,
2012 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START message
2014 * @param cls the client sending the message
2015 * @param zis_msg message from the client
2018 handle_monitor_start (void *cls,
2019 const struct ZoneMonitorStartMessage *zis_msg)
2021 struct NamestoreClient *nc = cls;
2022 struct ZoneMonitor *zm;
2024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2025 "Received ZONE_MONITOR_START message\n");
2026 zm = GNUNET_new (struct ZoneMonitor);
2028 zm->zone = zis_msg->zone;
2030 zm->in_first_iteration = (GNUNET_YES == ntohl (zis_msg->iterate_first));
2031 GNUNET_CONTAINER_DLL_insert (monitor_head,
2034 GNUNET_SERVICE_client_mark_monitor (nc->client);
2035 GNUNET_SERVICE_client_continue (nc->client);
2036 GNUNET_notification_context_add (monitor_nc,
2038 if (zm->in_first_iteration)
2039 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next,
2047 * Obtain the next datum during the zone monitor's zone initial iteration.
2049 * @param cls zone monitor that does its initial iteration
2052 monitor_iteration_next (void *cls)
2054 struct ZoneMonitor *zm = cls;
2058 GNUNET_assert (0 == zm->iteration_cnt);
2060 zm->iteration_cnt = zm->limit / 2; /* leave half for monitor events */
2062 zm->iteration_cnt = zm->limit; /* use it all */
2063 ret = GSN_database->iterate_records (GSN_database->cls,
2064 (0 == memcmp (&zm->zone,
2071 &monitor_iterate_cb,
2073 if (GNUNET_SYSERR == ret)
2075 GNUNET_SERVICE_client_drop (zm->nc->client);
2078 if (GNUNET_NO == ret)
2088 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_NEXT message
2090 * @param cls the client sending the message
2091 * @param nm message from the client
2094 handle_monitor_next (void *cls,
2095 const struct ZoneMonitorNextMessage *nm)
2097 struct NamestoreClient *nc = cls;
2098 struct ZoneMonitor *zm;
2101 inc = GNUNET_ntohll (nm->limit);
2102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2103 "Received ZONE_MONITOR_NEXT message with limit %llu\n",
2104 (unsigned long long) inc);
2105 for (zm = monitor_head; NULL != zm; zm = zm->next)
2111 GNUNET_SERVICE_client_drop (nc->client);
2114 GNUNET_SERVICE_client_continue (nc->client);
2115 if (zm->limit + inc < zm->limit)
2118 GNUNET_SERVICE_client_drop (nc->client);
2122 if ( (zm->in_first_iteration) &&
2123 (zm->limit == inc) )
2125 /* We are still iterating, and the previous iteration must
2126 have stopped due to the client's limit, so continue it! */
2127 GNUNET_assert (NULL == zm->task);
2128 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next,
2131 GNUNET_assert (zm->iteration_cnt <= zm->limit);
2132 if ( (zm->limit > zm->iteration_cnt) &&
2135 monitor_unblock (zm);
2137 else if (GNUNET_YES == zm->sa_waiting)
2139 if (NULL != zm->sa_wait_warning)
2140 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
2141 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
2142 zm->sa_wait_warning = GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
2150 * Process namestore requests.
2152 * @param cls closure
2153 * @param cfg configuration to use
2154 * @param service the initialized service
2158 const struct GNUNET_CONFIGURATION_Handle *cfg,
2159 struct GNUNET_SERVICE_Handle *service)
2165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2166 "Starting namestore service\n");
2167 cache_keys = GNUNET_CONFIGURATION_get_value_yesno (cfg,
2170 disable_namecache = GNUNET_CONFIGURATION_get_value_yesno (cfg,
2174 monitor_nc = GNUNET_notification_context_create (1);
2175 if (GNUNET_YES != disable_namecache)
2177 namecache = GNUNET_NAMECACHE_connect (cfg);
2178 GNUNET_assert (NULL != namecache);
2180 /* Loading database plugin */
2182 GNUNET_CONFIGURATION_get_value_string (cfg,
2186 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2187 "No database backend configured\n");
2189 GNUNET_asprintf (&db_lib_name,
2190 "libgnunet_plugin_namestore_%s",
2192 GSN_database = GNUNET_PLUGIN_load (db_lib_name,
2194 GNUNET_free (database);
2195 statistics = GNUNET_STATISTICS_create ("namestore",
2197 GNUNET_SCHEDULER_add_shutdown (&cleanup_task,
2199 if (NULL == GSN_database)
2201 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2202 "Could not load database backend `%s'\n",
2204 GNUNET_SCHEDULER_shutdown ();
2211 * Define "main" method using service macro.
2215 GNUNET_SERVICE_OPTION_NONE,
2218 &client_disconnect_cb,
2220 GNUNET_MQ_hd_var_size (record_store,
2221 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE,
2222 struct RecordStoreMessage,
2224 GNUNET_MQ_hd_var_size (record_lookup,
2225 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP,
2226 struct LabelLookupMessage,
2228 GNUNET_MQ_hd_fixed_size (zone_to_name,
2229 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME,
2230 struct ZoneToNameMessage,
2232 GNUNET_MQ_hd_fixed_size (iteration_start,
2233 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START,
2234 struct ZoneIterationStartMessage,
2236 GNUNET_MQ_hd_fixed_size (iteration_next,
2237 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT,
2238 struct ZoneIterationNextMessage,
2240 GNUNET_MQ_hd_fixed_size (iteration_stop,
2241 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP,
2242 struct ZoneIterationStopMessage,
2244 GNUNET_MQ_hd_fixed_size (monitor_start,
2245 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START,
2246 struct ZoneMonitorStartMessage,
2248 GNUNET_MQ_hd_fixed_size (monitor_next,
2249 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_NEXT,
2250 struct ZoneMonitorNextMessage,
2252 GNUNET_MQ_handler_end ());
2255 /* end of gnunet-service-namestore.c */