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-rw-r--r--lib/libdvben50221/en50221_app_datetime.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_app_datetime.c b/lib/libdvben50221/en50221_app_datetime.c
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+++ b/lib/libdvben50221/en50221_app_datetime.c
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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
+*/
+
+#include <string.h>
+#include <libdvbmisc/dvbmisc.h>
+#include <pthread.h>
+#include <libucsi/dvb/types.h>
+#include "en50221_app_datetime.h"
+#include "en50221_app_tags.h"
+#include "asn_1.h"
+
+struct en50221_app_datetime {
+ struct en50221_app_send_functions *funcs;
+
+ en50221_app_datetime_enquiry_callback callback;
+ void *callback_arg;
+
+ pthread_mutex_t lock;
+};
+
+static int en50221_app_datetime_parse_enquiry(struct en50221_app_datetime *datetime,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length);
+
+
+
+struct en50221_app_datetime *en50221_app_datetime_create(struct en50221_app_send_functions *funcs)
+{
+ struct en50221_app_datetime *datetime = NULL;
+
+ // create structure and set it up
+ datetime = malloc(sizeof(struct en50221_app_datetime));
+ if (datetime == NULL) {
+ return NULL;
+ }
+ datetime->funcs = funcs;
+ datetime->callback = NULL;
+
+ pthread_mutex_init(&datetime->lock, NULL);
+
+ // done
+ return datetime;
+}
+
+void en50221_app_datetime_destroy(struct en50221_app_datetime *datetime)
+{
+ pthread_mutex_destroy(&datetime->lock);
+ free(datetime);
+}
+
+void en50221_app_datetime_register_enquiry_callback(struct en50221_app_datetime *datetime,
+ en50221_app_datetime_enquiry_callback callback,
+ void *arg)
+{
+ pthread_mutex_lock(&datetime->lock);
+ datetime->callback = callback;
+ datetime->callback_arg = arg;
+ pthread_mutex_unlock(&datetime->lock);
+}
+
+int en50221_app_datetime_send(struct en50221_app_datetime *datetime,
+ uint16_t session_number,
+ time_t utc_time, int time_offset)
+{
+ uint8_t data[11];
+ int data_length;
+
+ data[0] = (TAG_DATE_TIME >> 16) & 0xFF;
+ data[1] = (TAG_DATE_TIME >> 8) & 0xFF;
+ data[2] = TAG_DATE_TIME & 0xFF;
+ if (time_offset != -1) {
+ data[3] = 7;
+ unixtime_to_dvbdate(utc_time, data + 4);
+ data[9] = time_offset >> 8;
+ data[10] = time_offset;
+ data_length = 11;
+ } else {
+ data[3] = 5;
+ unixtime_to_dvbdate(utc_time, data + 4);
+ data_length = 9;
+ }
+ return datetime->funcs->send_data(datetime->funcs->arg,
+ session_number, data,
+ data_length);
+}
+
+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)
+{
+ (void) resource_id;
+
+ // get the tag
+ if (data_length < 3) {
+ print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+ return -1;
+ }
+ uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2];
+
+ switch (tag) {
+ case TAG_DATE_TIME_ENQUIRY:
+ return en50221_app_datetime_parse_enquiry(datetime,
+ slot_id,
+ session_number,
+ data + 3,
+ data_length - 3);
+ }
+
+ print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag);
+ return -1;
+}
+
+
+
+
+
+
+
+
+
+
+static int en50221_app_datetime_parse_enquiry(struct en50221_app_datetime *datetime,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length)
+{
+ // validate data
+ if (data_length != 2) {
+ print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+ return -1;
+ }
+ if (data[0] != 1) {
+ print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+ return -1;
+ }
+ uint8_t response_interval = data[1];
+
+ // tell the app
+ pthread_mutex_lock(&datetime->lock);
+ en50221_app_datetime_enquiry_callback cb = datetime->callback;
+ void *cb_arg = datetime->callback_arg;
+ pthread_mutex_unlock(&datetime->lock);
+ if (cb) {
+ return cb(cb_arg, slot_id, session_number,
+ response_interval);
+ }
+ return 0;
+}