-/**
- * Method called periodically that triggers iteration over authoritative records
- *
- * @param cls closure
- */
-static void
-publish_zone_dht_next (void *cls)
-{
- zone_publish_task = NULL;
- GNUNET_assert (NULL != namestore_iter);
- GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
-}
-
-
-/**
- * Periodically iterate over our zone and store everything in dht
- *
- * @param cls NULL
- */
-static void
-publish_zone_dht_start (void *cls);
-
-
-/**
- * Continuation called from DHT once the PUT operation is done.
- *
- * @param cls closure, NULL if called from regular iteration,
- * `struct MonitorActivity` if called from #handle_monitor_event.
- * @param success #GNUNET_OK on success
- */
-static void
-dht_put_continuation (void *cls,
- int success)
-{
- struct MonitorActivity *ma = cls;
- struct GNUNET_TIME_Relative next_put_interval;
-
- num_public_records++;
- if (NULL == ma)
- {
- active_put = NULL;
- if ( (num_public_records > last_num_public_records) &&
- (GNUNET_NO == first_zone_iteration) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Last record count was lower than current record count. Reducing interval.\n");
- put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
- num_public_records);
- next_put_interval = GNUNET_TIME_relative_divide (put_interval,
- LATE_ITERATION_SPEEDUP_FACTOR);
- }
- else
- next_put_interval = put_interval;
- next_put_interval = GNUNET_TIME_relative_min (next_put_interval,
- MAXIMUM_ZONE_ITERATION_INTERVAL);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "PUT complete, next PUT in %s!\n",
- GNUNET_STRINGS_relative_time_to_string (next_put_interval,
- GNUNET_YES));
-
- GNUNET_STATISTICS_set (statistics,
- "Current zone iteration interval (ms)",
- next_put_interval.rel_value_us / 1000LL,
- GNUNET_NO);
- GNUNET_assert (NULL == zone_publish_task);
- zone_publish_task = GNUNET_SCHEDULER_add_delayed (next_put_interval,
- &publish_zone_dht_next,
- NULL);
- }
- else
- {
- GNUNET_CONTAINER_DLL_remove (ma_head,
- ma_tail,
- ma);
- GNUNET_free (ma);
- }
-}
-
-
-/**
- * Convert namestore records from the internal format to that
- * suitable for publication (removes private records, converts
- * to absolute expiration time).
- *
- * @param rd input records
- * @param rd_count size of the @a rd and @a rd_public arrays
- * @param rd_public where to write the converted records
- * @return number of records written to @a rd_public
- */
-static unsigned int
-convert_records_for_export (const struct GNUNET_GNSRECORD_Data *rd,
- unsigned int rd_count,
- struct GNUNET_GNSRECORD_Data *rd_public)
-{
- struct GNUNET_TIME_Absolute now;
- unsigned int rd_public_count;
- unsigned int i;
-
- rd_public_count = 0;
- now = GNUNET_TIME_absolute_get ();
- for (i=0;i<rd_count;i++)
- if (0 == (rd[i].flags & GNUNET_GNSRECORD_RF_PRIVATE))
- {
- rd_public[rd_public_count] = rd[i];
- if (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
- {
- /* GNUNET_GNSRECORD_block_create will convert to absolute time;
- we just need to adjust our iteration frequency */
- min_relative_record_time.rel_value_us =
- GNUNET_MIN (rd_public[rd_public_count].expiration_time,
- min_relative_record_time.rel_value_us);
- }
- else if (rd_public[rd_public_count].expiration_time < now.abs_value_us)
- {
- /* record already expired, skip it */
- continue;
- }
- rd_public_count++;
- }
- return rd_public_count;
-}
-
-
-/**
- * Store GNS records in the DHT.
- *
- * @param key key of the zone
- * @param label label to store under
- * @param rd_public public record data
- * @param rd_public_count number of records in @a rd_public
- * @param pc_arg closure argument to pass to the #dht_put_continuation
- * @return DHT PUT handle, NULL on error
- */
-static struct GNUNET_DHT_PutHandle *
-perform_dht_put (const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
- const char *label,
- const struct GNUNET_GNSRECORD_Data *rd_public,
- unsigned int rd_public_count,
- void *pc_arg)
-{
- struct GNUNET_GNSRECORD_Block *block;
- struct GNUNET_HashCode query;
- struct GNUNET_TIME_Absolute expire;
- size_t block_size;
- struct GNUNET_DHT_PutHandle *ret;
-
- expire = GNUNET_GNSRECORD_record_get_expiration_time (rd_public_count,
- rd_public);
- block = GNUNET_GNSRECORD_block_create (key,
- expire,
- label,
- rd_public,
- rd_public_count);
- if (NULL == block)
- return NULL; /* whoops */
- block_size = ntohl (block->purpose.size)
- + sizeof (struct GNUNET_CRYPTO_EcdsaSignature)
- + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
- GNUNET_GNSRECORD_query_from_private_key (key,
- label,
- &query);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Storing %u record(s) for label `%s' in DHT with expiration `%s' under key %s\n",
- rd_public_count,
- label,
- GNUNET_STRINGS_absolute_time_to_string (expire),
- GNUNET_h2s (&query));
- ret = GNUNET_DHT_put (dht_handle,
- &query,
- DHT_GNS_REPLICATION_LEVEL,
- GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
- GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
- block_size,
- block,
- expire,
- &dht_put_continuation,
- pc_arg);
- GNUNET_free (block);
- return ret;
-}
-
-
-/**
- * We encountered an error in our zone iteration.
- */
-static void
-zone_iteration_error (void *cls)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Got disconnected from namestore database, retrying.\n");
- namestore_iter = NULL;
- /* We end up here on error/disconnect/shutdown, so potentially
- while a zone publish task or a DHT put is still running; hence
- we need to cancel those. */
- if (NULL != zone_publish_task)
- {
- GNUNET_SCHEDULER_cancel (zone_publish_task);
- zone_publish_task = NULL;
- }
- if (NULL != active_put)
- {
- GNUNET_DHT_put_cancel (active_put);
- active_put = NULL;
- }
- zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
- NULL);
-}
-
-
-/**
- * Zone iteration is completed.
- */
-static void
-zone_iteration_finished (void *cls)
-{
- /* we're done with one iteration, calculate when to do the next one */
- namestore_iter = NULL;
- last_num_public_records = num_public_records;
- first_zone_iteration = GNUNET_NO;
- if (0 == num_public_records)
- {
- /**
- * If no records are known (startup) or none present
- * we can safely set the interval to the value for a single
- * record
- */
- put_interval = zone_publish_time_window;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
- "No records in namestore database.\n");
- }
- else
- {
- /* If records are present, next publication is based on the minimum
- * relative expiration time of the records published divided by 4
- */
- zone_publish_time_window
- = GNUNET_TIME_relative_min (GNUNET_TIME_relative_divide (min_relative_record_time, 4),
- zone_publish_time_window_default);
- put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
- num_public_records);
- }
- /* reset for next iteration */
- min_relative_record_time = GNUNET_TIME_UNIT_FOREVER_REL;
- put_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
- put_interval);
- put_interval = GNUNET_TIME_relative_min (put_interval,
- MAXIMUM_ZONE_ITERATION_INTERVAL);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Zone iteration finished. Adjusted zone iteration interval to %s\n",
- GNUNET_STRINGS_relative_time_to_string (put_interval,
- GNUNET_YES));
- GNUNET_STATISTICS_set (statistics,
- "Current zone iteration interval (in ms)",
- put_interval.rel_value_us / 1000LL,
- GNUNET_NO);
- GNUNET_STATISTICS_update (statistics,
- "Number of zone iterations",
- 1,
- GNUNET_NO);
- GNUNET_STATISTICS_set (statistics,
- "Number of public records in DHT",
- last_num_public_records,
- GNUNET_NO);
- GNUNET_assert (NULL == zone_publish_task);
- if (0 == num_public_records)
- zone_publish_task = GNUNET_SCHEDULER_add_delayed (put_interval,
- &publish_zone_dht_start,
- NULL);
- else
- zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
- NULL);
-}
-
-
-/**
- * Function used to put all records successively into the DHT.
- *
- * @param cls the closure (NULL)
- * @param key the private key of the authority (ours)
- * @param label the name of the records, NULL once the iteration is done
- * @param rd_count the number of records in @a rd
- * @param rd the record data
- */
-static void
-put_gns_record (void *cls,
- const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
- const char *label,
- unsigned int rd_count,
- const struct GNUNET_GNSRECORD_Data *rd)
-{
- struct GNUNET_GNSRECORD_Data rd_public[rd_count];
- unsigned int rd_public_count;
-
- rd_public_count = convert_records_for_export (rd,
- rd_count,
- rd_public);
-
- if (0 == rd_public_count)
- {
- GNUNET_assert (NULL == zone_publish_task);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Record set empty, moving to next record set\n");
- zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_next,
- NULL);
- return;
- }
- /* We got a set of records to publish */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting DHT PUT\n");
- active_put = perform_dht_put (key,
- label,
- rd_public,
- rd_public_count,
- NULL);
- if (NULL == active_put)
- {
- GNUNET_break (0);
- dht_put_continuation (NULL, GNUNET_NO);
- }
-}
-
-
-/**
- * Periodically iterate over all zones and store everything in DHT
- *
- * @param cls NULL
- */
-static void
-publish_zone_dht_start (void *cls)
-{
- zone_publish_task = NULL;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting DHT zone update!\n");
- /* start counting again */
- num_public_records = 0;
- GNUNET_assert (NULL == namestore_iter);
- namestore_iter
- = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
- NULL, /* All zones */
- &zone_iteration_error,
- NULL,
- &put_gns_record,
- NULL,
- &zone_iteration_finished,
- NULL);
-}
-
-
-/**
- * Process a record that was stored in the namestore
- * (invoked by the monitor).
- *
- * @param cls closure, NULL
- * @param zone private key of the zone; NULL on disconnect
- * @param label label of the records; NULL on disconnect
- * @param rd_count number of entries in @a rd array, 0 if label was deleted
- * @param rd array of records with data to store
- */
-static void
-handle_monitor_event (void *cls,
- const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
- const char *label,
- unsigned int rd_count,
- const struct GNUNET_GNSRECORD_Data *rd)
-{
- struct GNUNET_GNSRECORD_Data rd_public[rd_count];
- unsigned int rd_public_count;
- struct MonitorActivity *ma;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received %u records for label `%s' via namestore monitor\n",
- rd_count,
- label);
- /* filter out records that are not public, and convert to
- absolute expiration time. */
- rd_public_count = convert_records_for_export (rd,
- rd_count,
- rd_public);
- if (0 == rd_public_count)
- return; /* nothing to do */
- ma = GNUNET_new (struct MonitorActivity);
- ma->ph = perform_dht_put (zone,
- label,
- rd,
- rd_count,
- ma);
- if (NULL == ma->ph)
- {
- /* PUT failed, do not remember operation */
- GNUNET_free (ma);
- return;
- }
- GNUNET_CONTAINER_DLL_insert (ma_head,
- ma_tail,
- ma);
-}
-
-
-/* END DHT ZONE PROPAGATION */
-
-