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/*
* section and descriptor parser
*
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
* Copyright (C) 2005 Patrick Boettcher (pb@linuxtv.org)
*
* 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 library 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <libucsi/dvb/int_section.h>
struct dvb_int_section * dvb_int_section_codec(struct section_ext *ext)
{
uint8_t *buf = (uint8_t *) ext;
struct dvb_int_section *in = (struct dvb_int_section *) ext;
size_t pos = sizeof(struct section_ext);
size_t len = section_ext_length(ext);
if (len < sizeof(struct dvb_int_section))
return NULL;
bswap32(buf+8);
bswap16(buf+12);
pos += 6;
if (len - pos < in->platform_descriptors_length)
return NULL;
if (verify_descriptors(buf + pos, in->platform_descriptors_length))
return NULL;
pos += in->platform_descriptors_length;
while (pos < len) {
struct dvb_int_target *s2 = (struct dvb_int_target *) (buf + pos);
struct dvb_int_operational_loop *s3;
bswap16(buf + pos); /* target_descriptor_loop_length swap */
if (len - pos < s2->target_descriptors_length)
return NULL;
pos += sizeof(struct dvb_int_target);
if (verify_descriptors(buf + pos, s2->target_descriptors_length))
return NULL;
pos += s2->target_descriptors_length;
s3 = (struct dvb_int_operational_loop *) (buf + pos);
bswap16(buf + pos); /* operational_descriptor_loop_length swap */
if (len - pos < s3->operational_descriptors_length)
return NULL;
pos += sizeof(struct dvb_int_operational_loop);
if (verify_descriptors(buf + pos, s3->operational_descriptors_length))
return NULL;
pos += s3->operational_descriptors_length;
}
return (struct dvb_int_section *) ext;
}
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