/*
This file is part of GNUnet
- Copyright (C) 2006, 2009, 2015 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2006, 2009, 2015 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
}
+/**
+ * Iterate over the results that are "close" to a particular key in
+ * the datacache. "close" is defined as numerically larger than @a
+ * key (when interpreted as a circular address space), with small
+ * distance.
+ *
+ * @param cls closure (internal context for the plugin)
+ * @param key area of the keyspace to look into
+ * @param num_results number of results that should be returned to @a iter
+ * @param iter maybe NULL (to just count)
+ * @param iter_cls closure for @a iter
+ * @return the number of results found
+ */
+static unsigned int
+sqlite_plugin_get_closest (void *cls,
+ const struct GNUNET_HashCode *key,
+ unsigned int num_results,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
+{
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+ struct GNUNET_TIME_Absolute now;
+ struct GNUNET_TIME_Absolute exp;
+ unsigned int size;
+ const char *dat;
+ unsigned int cnt;
+ unsigned int psize;
+ unsigned int type;
+ int64_t ntime;
+ const struct GNUNET_PeerIdentity *path;
+
+ now = GNUNET_TIME_absolute_get ();
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing GET_CLOSEST for key `%4s'\n",
+ GNUNET_h2s (key));
+ if (SQLITE_OK !=
+ sq_prepare (plugin->dbh,
+ "SELECT value,expire,path,type,key FROM ds090 WHERE key>=? AND expire >= ? ORDER BY KEY ASC LIMIT ?",
+ &stmt))
+ {
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
+ return 0;
+ }
+ ntime = (int64_t) now.abs_value_us;
+ GNUNET_assert (ntime >= 0);
+ if ((SQLITE_OK !=
+ sqlite3_bind_blob (stmt,
+ 1,
+ key,
+ sizeof (struct GNUNET_HashCode),
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 2, now.abs_value_us)) ||
+ (SQLITE_OK != sqlite3_bind_int (stmt, 3, num_results)) )
+ {
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_xxx");
+ sqlite3_finalize (stmt);
+ return 0;
+ }
+ cnt = 0;
+ while (SQLITE_ROW == sqlite3_step (stmt))
+ {
+ if (sizeof (struct GNUNET_HashCode) !=
+ sqlite3_column_bytes (stmt, 4))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ size = sqlite3_column_bytes (stmt, 0);
+ dat = sqlite3_column_blob (stmt, 0);
+ exp.abs_value_us = sqlite3_column_int64 (stmt, 1);
+ psize = sqlite3_column_bytes (stmt, 2);
+ type = sqlite3_column_int (stmt, 3);
+ key = sqlite3_column_blob (stmt, 4);
+ if (0 != psize % sizeof (struct GNUNET_PeerIdentity))
+ {
+ GNUNET_break (0);
+ psize = 0;
+ }
+ psize /= sizeof (struct GNUNET_PeerIdentity);
+ if (0 != psize)
+ path = sqlite3_column_blob (stmt, 2);
+ else
+ path = NULL;
+ ntime = (int64_t) exp.abs_value_us;
+ if (ntime == INT64_MAX)
+ exp = GNUNET_TIME_UNIT_FOREVER_ABS;
+ cnt++;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found %u-byte result at %s when processing GET_CLOSE\n",
+ (unsigned int) size,
+ GNUNET_h2s (key));
+ if (GNUNET_OK != iter (iter_cls,
+ key,
+ size,
+ dat,
+ type,
+ exp,
+ psize,
+ path))
+ {
+ sqlite3_finalize (stmt);
+ break;
+ }
+ }
+ sqlite3_finalize (stmt);
+ return cnt;
+}
+
+
/**
* Entry point for the plugin.
*
api->put = &sqlite_plugin_put;
api->del = &sqlite_plugin_del;
api->get_random = &sqlite_plugin_get_random;
+ api->get_closest = &sqlite_plugin_get_closest;
LOG (GNUNET_ERROR_TYPE_INFO,
"Sqlite datacache running\n");
return api;
#if !WINDOWS || defined(__CYGWIN__)
if ( (NULL != plugin->fn) &&
(0 != UNLINK (plugin->fn)) )
- LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", plugin->fn);
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ plugin->fn);
GNUNET_free_non_null (plugin->fn);
#endif
result = sqlite3_close (plugin->dbh);
#if SQLITE_VERSION_NUMBER >= 3007000
- if (result == SQLITE_BUSY)
+ if (SQLITE_BUSY == result)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
- _
- ("Tried to close sqlite without finalizing all prepared statements.\n"));
+ _("Tried to close sqlite without finalizing all prepared statements.\n"));
stmt = sqlite3_next_stmt (plugin->dbh, NULL);
- while (stmt != NULL)
+ while (NULL != stmt)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Closing statement %p\n", stmt);
result = sqlite3_finalize (stmt);
if (result != SQLITE_OK)
- LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to close statement %p: %d\n"),
- stmt, result);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Failed to close statement %p: %d\n",
+ stmt,
+ result);
stmt = sqlite3_next_stmt (plugin->dbh, NULL);
}
result = sqlite3_close (plugin->dbh);
}
#endif
if (SQLITE_OK != result)
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR, "sqlite3_close");
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR,
+ "sqlite3_close");
#if WINDOWS && !defined(__CYGWIN__)
if ( (NULL != plugin->fn) &&
(0 != UNLINK (plugin->fn)) )
- LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", plugin->fn);
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ plugin->fn);
GNUNET_free_non_null (plugin->fn);
#endif
GNUNET_free (plugin);
projects / oweals / gnunet.git / blobdiff