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diff --git a/lib/libdvben50221/en50221_app_datetime.h b/lib/libdvben50221/en50221_app_datetime.h
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+/*
+    en50221 encoder An implementation for libdvb
+    an implementation for the en50221 transport layer
+
+    Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com>
+    Copyright (C) 2005 Julian Scheel (julian at jusst dot de)
+    Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as
+    published by the Free Software Foundation; either version 2.1 of
+    the License, or (at your option) any later version.
+
+    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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+*/
+
+#ifndef __EN50221_APPLICATION_DATETIME_H__
+#define __EN50221_APPLICATION_DATETIME_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <libdvben50221/en50221_app_utils.h>
+
+#define EN50221_APP_DATETIME_RESOURCEID MKRID(36,1,1)
+
+/**
+ * Type definition for enquiry - called when we receive a date/time enquiry from a CAM.
+ *
+ * @param arg Private argument.
+ * @param slot_id Slot id concerned.
+ * @param session_number Session number concerned.
+ * @param response_interval Response interval requested by CAM.
+ * @return 0 on success, -1 on failure.
+ */
+typedef int (*en50221_app_datetime_enquiry_callback) (void *arg,
+						      uint8_t slot_id,
+						      uint16_t session_number,
+						      uint8_t response_interval);
+
+/**
+ * Opaque type representing a datetime resource.
+ */
+struct en50221_app_datetime;
+
+/**
+ * Create an instance of the datetime resource.
+ *
+ * @param funcs Send functions to use.
+ * @return Instance, or NULL on failure.
+ */
+extern struct en50221_app_datetime
+	*en50221_app_datetime_create(struct en50221_app_send_functions *funcs);
+
+/**
+ * Destroy an instance of the datetime resource.
+ *
+ * @param datetime Instance to destroy.
+ */
+extern void en50221_app_datetime_destroy(struct en50221_app_datetime *datetime);
+
+/**
+ * Register the callback for when we receive a enquiry request.
+ *
+ * @param datetime datetime resource instance.
+ * @param callback The callback. Set to NULL to remove the callback completely.
+ * @param arg Private data passed as arg0 of the callback.
+ */
+extern void en50221_app_datetime_register_enquiry_callback(struct en50221_app_datetime *datetime,
+							   en50221_app_datetime_enquiry_callback callback,
+							   void *arg);
+
+/**
+ * Send the time to the CAM.
+ *
+ * @param datetime datetime resource instance.
+ * @param session_number Session number to send it on.
+ * @param utc_time UTC time in unix time format.
+ * @param time_offset If -1, the field will not be transmitted, otherwise it is the offset between
+ * UTC and local time in minutes.
+ * @return 0 on success, -1 on failure.
+ */
+extern int en50221_app_datetime_send(struct en50221_app_datetime *datetime,
+				     uint16_t session_number,
+				     time_t utc_time,
+				     int time_offset);
+
+/**
+ * Pass data received for this resource into it for parsing.
+ *
+ * @param datetime datetime instance.
+ * @param slot_id Slot ID concerned.
+ * @param session_number Session number concerned.
+ * @param resource_id Resource ID concerned.
+ * @param data The data.
+ * @param data_length Length of data in bytes.
+ * @return 0 on success, -1 on failure.
+ */
+extern int en50221_app_datetime_message(struct en50221_app_datetime *datetime,
+					uint8_t slot_id,
+					uint16_t session_number,
+					uint32_t resource_id,
+					uint8_t *data,
+					uint32_t data_length);
+
+#ifdef __cplusplus
+}
+#endif
+#endif