1 files changed, 85 insertions, 0 deletions
diff --git a/src/libcharon/encoding/generator.h b/src/libcharon/encoding/generator.h
new file mode 100644
index 000000000..2221c84af
--- /dev/null
+++ b/src/libcharon/encoding/generator.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2005-2009 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 generator generator
+ * @{ @ingroup encoding
+ */
+
+#ifndef GENERATOR_H_
+#define GENERATOR_H_
+
+typedef struct generator_t generator_t;
+
+#include <library.h>
+#include <encoding/payloads/encodings.h>
+#include <encoding/payloads/payload.h>
+
+/**
+ * Generating is done in a data buffer.
+ * This is the start size of this buffer in bytes.
+ */
+#define GENERATOR_DATA_BUFFER_SIZE 500
+
+/**
+ * Number of bytes to increase the buffer, if it is too small.
+ */
+#define GENERATOR_DATA_BUFFER_INCREASE_VALUE 500
+
+
+/**
+ * A generator_t class used to generate IKEv2 payloads.
+ *
+ * After creation, multiple payloads can be generated with the generate_payload
+ * method. The generated bytes are appended. After all payloads are added,
+ * the write_to_chunk method writes out all generated data since
+ * the creation of the generator. After that, the generator must be destroyed.
+ * The generater uses a set of encoding rules, which it can get from
+ * the supplied payload. With this rules, the generater can generate
+ * the payload and all substructures automatically.
+ */
+struct generator_t {
+
+	/**
+	 * Generates a specific payload from given payload object.
+	 *
+	 * Remember: Header and substructures are also handled as payloads.
+	 *
+	 * @param payload 		interface payload_t implementing object
+	 */
+	void (*generate_payload) (generator_t *this,payload_t *payload);
+
+	/**
+	 * Writes all generated data of the generator to a chunk.
+	 *
+	 * @param data 		chunk to write the data to
+	 */
+	void (*write_to_chunk) (generator_t *this,chunk_t *data);
+
+	/**
+	 * Destroys a generator_t object.
+	 */
+	void (*destroy) (generator_t *this);
+};
+
+/**
+ * Constructor to create a generator.
+ *
+ * @return generator_t object.
+ */
+generator_t *generator_create(void);
+
+#endif /** GENERATOR_H_ @}*/