ikev1: Move defragmentation to message_t

src/libcharon/encoding/message.h

@@ -296,6 +296,26 @@ struct message_t {
 	 */
 	bool (*is_fragmented)(message_t *this);
 
+	/**
+	 * Add a fragment to the message if it was created with
+	 * message_create_defrag().
+	 *
+	 * Once the message is completed it should be processed like any other
+	 * inbound message.
+	 *
+	 * @note Only supported for IKEv1 at the moment.
+	 *
+	 * @param fragment	fragment to add
+	 * @return
+	 *					- SUCCESS if message was reassembled
+	 *					- NEED_MORE if not all fragments have yet been received
+	 *					- FAILED if reassembling failed
+	 *					- INVALID_ARG if fragment is invalid for some reason
+	 *					- INVALID_STATE if message was not created using
+	 *					  message_create_defrag()
+	 */
+	status_t (*add_fragment)(message_t *this, message_t *fragment);
+
 	/**
 	 * Gets the source host informations.
 	 *
@@ -419,4 +439,14 @@ message_t *message_create_from_packet(packet_t *packet);
  */
 message_t *message_create(int major, int minor);
 
+/**
+ * Creates a message_t object that is used to reassemble fragmented messages.
+ *
+ * Use add_fragment() to add fragments.
+ *
+ * @param fragment		initial fragment (is not added)
+ * @return				message_t object, NULL if fragment is not actually one
+ */
+message_t *message_create_defrag(message_t *fragment);
+
 #endif /** MESSAGE_H_ @}*/