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diff --git a/src/libstrongswan/attributes/attribute_handler.h b/src/libstrongswan/attributes/attribute_handler.h
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+++ b/src/libstrongswan/attributes/attribute_handler.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+/**
+ * @defgroup attribute_handler attribute_handler
+ * @{ @ingroup attributes
+ */
+
+#ifndef ATTRIBUTE_HANDLER_H_
+#define ATTRIBUTE_HANDLER_H_
+
+#include <chunk.h>
+#include <utils/host.h>
+#include <utils/identification.h>
+
+#include "attributes.h"
+
+typedef struct attribute_handler_t attribute_handler_t;
+
+/**
+ * Interface to handle configuration payload attributes.
+ */
+struct attribute_handler_t {
+
+	/**
+	 * Handle a configuration attribute.
+	 *
+	 * After receiving a configuration attriubte, it is passed to each
+	 * attribute handler until it is handled.
+	 *
+	 * @param server	server from which the attribute was received
+	 * @param type		type of configuration attribute to handle
+	 * @param data		associated attribute data
+	 * @return			TRUE if attribute handled
+	 */
+	bool (*handle)(attribute_handler_t *this, identification_t *server,
+				   configuration_attribute_type_t type, chunk_t data);
+
+	/**
+	 * Release an attribute handled during handle().
+	 *
+	 * A handler that handle()d an attribute gets a call to release() when the
+	 * connection gets closed. Depending on the implementation, this is required
+	 * to remove the attribute.
+	 */
+	void (*release)(attribute_handler_t *this, identification_t *server,
+					configuration_attribute_type_t type, chunk_t data);
+
+	/**
+	 * Enumerate attributes to request from a server.
+	 *
+	 * @param server		server identity to request attributes from
+	 * @param vip			virtual IP we are requesting, if any
+	 * @return				enumerator (configuration_attribute_type_t, chunk_t)
+	 */
+	enumerator_t* (*create_attribute_enumerator)(attribute_handler_t *this,
+										identification_t *server, host_t *vip);
+};
+
+#endif /** ATTRIBUTE_HANDLER_H_ @}*/