From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/dvb/int_section.c | 79 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 lib/libucsi/dvb/int_section.c (limited to 'lib/libucsi/dvb/int_section.c') diff --git a/lib/libucsi/dvb/int_section.c b/lib/libucsi/dvb/int_section.c new file mode 100644 index 0000000..c2bb15f --- /dev/null +++ b/lib/libucsi/dvb/int_section.c @@ -0,0 +1,79 @@ +/* + * 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 + +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; +} -- cgit v1.2.3