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diff --git a/src/manager/storage.h b/src/manager/storage.h
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+++ b/src/manager/storage.h
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+/*
+ * Copyright (C) 2007 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * $Id: storage.h 3589 2008-03-13 14:14:44Z martin $
+ */
+
+/**
+ * @defgroup storage storage
+ * @{ @ingroup manager
+ */
+
+#ifndef STORAGE_H_
+#define STORAGE_H_
+
+#include <utils/enumerator.h>
+
+
+typedef struct storage_t storage_t;
+
+/**
+ * Persistent database storage.
+ */
+struct storage_t {
+
+	/**
+	 * Try to log in using specified credentials.
+	 *
+	 * @param username			username
+	 * @param password			plaintext password
+	 * @return					user ID if login good, 0 otherwise
+	 */
+	int (*login)(storage_t *this, char *username, char *password);
+	
+	/**
+	 * Create an iterator over the gateways.
+	 *
+	 * enumerate() arguments: int id, char *name, int port, char *address
+	 * If port is 0, address is a Unix socket address.
+	 *
+	 * @param user				user Id
+	 * @return					enumerator
+	 */
+	enumerator_t* (*create_gateway_enumerator)(storage_t *this, int user);	
+
+	/**
+     * Destroy a storage instance.
+     */
+    void (*destroy)(storage_t *this);
+};
+
+/**
+ * Create a storage instance.
+ *
+ * @param uri		database connection URI
+ */
+storage_t *storage_create(char *uri);
+
+#endif /* STORAGE_H_ @} */