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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;
}
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