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/*
* Copyright (c) 2011-2012 - Mauro Carvalho Chehab
* Copyright (c) 2012-2014 - Andre Roth <neolynx@gmail.com>
*
* This program 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 version 2.1 of the License.
*
* 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
#include <libdvbv5/sdt.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t dvb_table_sdt_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct dvb_table_sdt **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct dvb_table_sdt *sdt;
struct dvb_table_sdt_service **head;
size_t size;
size = offsetof(struct dvb_table_sdt, service);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != DVB_TABLE_SDT && buf[0] != DVB_TABLE_SDT2) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x or 0x%02x",
__func__, buf[0], DVB_TABLE_SDT, DVB_TABLE_SDT2);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct dvb_table_sdt), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
sdt = *table;
memcpy(sdt, p, size);
p += size;
dvb_table_header_init(&sdt->header);
bswap16(sdt->network_id);
/* find end of curent list */
head = &sdt->service;
while (*head != NULL)
head = &(*head)->next;
size = sdt->header.section_length + 3 - DVB_CRC_SIZE; /* plus header, minus CRC */
if (buf + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - buf, size);
return -4;
}
endbuf = buf + size;
/* get the event entries */
size = offsetof(struct dvb_table_sdt_service, descriptor);
while (p + size <= endbuf) {
struct dvb_table_sdt_service *service;
service = malloc(sizeof(struct dvb_table_sdt_service));
if (!service) {
dvb_logerr("%s: out of memory", __func__);
return -5;
}
memcpy(service, p, size);
p += size;
bswap16(service->service_id);
bswap16(service->bitfield);
service->descriptor = NULL;
service->next = NULL;
*head = service;
head = &(*head)->next;
/* parse the descriptors */
if (service->desc_length > 0) {
uint16_t desc_length = service->desc_length;
if (p + desc_length > endbuf) {
dvb_logwarn("%s: descriptors short read %zd/%d bytes", __func__,
endbuf - p, desc_length);
desc_length = endbuf - p;
}
if (dvb_desc_parse(parms, p, desc_length,
&service->descriptor) != 0) {
return -6;
}
p += desc_length;
}
}
if (endbuf - p)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void dvb_table_sdt_free(struct dvb_table_sdt *sdt)
{
struct dvb_table_sdt_service *service = sdt->service;
while(service) {
dvb_desc_free((struct dvb_desc **) &service->descriptor);
struct dvb_table_sdt_service *tmp = service;
service = service->next;
free(tmp);
}
free(sdt);
}
void dvb_table_sdt_print(struct dvb_v5_fe_parms *parms, struct dvb_table_sdt *sdt)
{
dvb_loginfo("SDT");
dvb_table_header_print(parms, &sdt->header);
dvb_loginfo("| network_id %d", sdt->network_id);
dvb_loginfo("| reserved %d", sdt->reserved);
dvb_loginfo("|\\");
const struct dvb_table_sdt_service *service = sdt->service;
uint16_t services = 0;
while (service) {
dvb_loginfo("|- service 0x%04x", service->service_id);
dvb_loginfo("| EIT schedule %d", service->EIT_schedule);
dvb_loginfo("| EIT present following %d", service->EIT_present_following);
dvb_loginfo("| free CA mode %d", service->free_CA_mode);
dvb_loginfo("| running status %d", service->running_status);
dvb_loginfo("| descriptor length %d", service->desc_length);
dvb_desc_print(parms, service->descriptor);
service = service->next;
services++;
}
dvb_loginfo("|_ %d services", services);
}
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