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/sit_section.c | 69 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 lib/libucsi/dvb/sit_section.c (limited to 'lib/libucsi/dvb/sit_section.c') diff --git a/lib/libucsi/dvb/sit_section.c b/lib/libucsi/dvb/sit_section.c new file mode 100644 index 0000000..06c228c --- /dev/null +++ b/lib/libucsi/dvb/sit_section.c @@ -0,0 +1,69 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 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 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_sit_section * dvb_sit_section_codec(struct section_ext * ext) +{ + uint8_t * buf = (uint8_t *) ext; + struct dvb_sit_section * ret = (struct dvb_sit_section *) ext; + size_t pos = sizeof(struct section_ext); + size_t len = section_ext_length(ext); + + if (len < sizeof(struct dvb_sit_section)) + return NULL; + + bswap16(buf + pos); + pos += 2; + + if ((pos + ret->transmission_info_loop_length) > len) + return NULL; + + if (verify_descriptors(buf + pos, ret->transmission_info_loop_length)) + return NULL; + + pos += ret->transmission_info_loop_length; + + while (pos < len) { + struct dvb_sit_service * service = (void*)(buf + pos); + + if ((pos + sizeof(struct dvb_sit_service)) > len) + return NULL; + + bswap16(buf + pos); + bswap16(buf + pos + 2); + bswap16(buf + pos + 4); + pos += sizeof(struct dvb_sit_service); + + if ((pos + service->service_loop_length) > len) + return NULL; + + if (verify_descriptors(buf + pos, service->service_loop_length)) + return NULL; + + pos += service->service_loop_length; + } + + if (pos != len) + return NULL; + + return ret; +} -- cgit v1.2.3