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/atsc/dccsct_section.c | 109 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 lib/libucsi/atsc/dccsct_section.c (limited to 'lib/libucsi/atsc/dccsct_section.c') diff --git a/lib/libucsi/atsc/dccsct_section.c b/lib/libucsi/atsc/dccsct_section.c new file mode 100644 index 0000000..59ad069 --- /dev/null +++ b/lib/libucsi/atsc/dccsct_section.c @@ -0,0 +1,109 @@ +/* + * 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 atsc_dccsct_section *atsc_dccsct_section_codec(struct atsc_section_psip *psip) +{ + uint8_t * buf = (uint8_t *) psip; + size_t pos = 0; + size_t len = section_ext_length(&(psip->ext_head)); + int idx; + + if (len < sizeof(struct atsc_dccsct_section)) + return NULL; + struct atsc_dccsct_section *dccsct = (struct atsc_dccsct_section *) psip; + + pos += sizeof(struct atsc_dccsct_section); + for(idx =0; idx < dccsct->updates_defined; idx++) { + if (len < (pos + sizeof(struct atsc_dccsct_update))) + return NULL; + struct atsc_dccsct_update *update = (struct atsc_dccsct_update *) (buf+pos); + + pos += sizeof(struct atsc_dccsct_update); + if (len < (pos + update->update_data_length)) + return NULL; + + switch(update->update_type) { + case ATSC_DCCST_UPDATE_NEW_GENRE: { + int sublen = sizeof(struct atsc_dccsct_update_new_genre); + if (update->update_data_length < sublen) + return NULL; + + if (atsc_text_validate(buf+pos+sublen, update->update_data_length - sublen)) + return NULL; + break; + } + case ATSC_DCCST_UPDATE_NEW_STATE: { + int sublen = sizeof(struct atsc_dccsct_update_new_state); + if (update->update_data_length < sublen) + return NULL; + + if (atsc_text_validate(buf+pos+sublen, update->update_data_length - sublen)) + return NULL; + break; + } + case ATSC_DCCST_UPDATE_NEW_COUNTY: { + int sublen = sizeof(struct atsc_dccsct_update_new_county); + if (update->update_data_length < sublen) + return NULL; + bswap16(buf+pos+1); + + if (atsc_text_validate(buf+pos+sublen, update->update_data_length - sublen)) + return NULL; + break; + } + } + + pos += update->update_data_length; + if (len < (pos + sizeof(struct atsc_dccsct_update_part2))) + return NULL; + struct atsc_dccsct_update_part2 *part2 = (struct atsc_dccsct_update_part2 *) buf + pos; + + bswap16(buf+pos); + + pos += sizeof(struct atsc_dccsct_update_part2); + if (len < (pos + part2->descriptors_length)) + return NULL; + if (verify_descriptors(buf + pos, part2->descriptors_length)) + return NULL; + + pos += part2->descriptors_length; + } + + if (len < (pos + sizeof(struct atsc_dccsct_section_part2))) + return NULL; + struct atsc_dccsct_section_part2 *part2 = (struct atsc_dccsct_section_part2 *) (buf+pos); + + bswap16(buf+pos); + + pos += sizeof(struct atsc_dccsct_section_part2); + if (len < (pos + part2->descriptors_length)) + return NULL; + if (verify_descriptors(buf + pos, part2->descriptors_length)) + return NULL; + + pos += part2->descriptors_length; + if (pos != len) + return NULL; + + return (struct atsc_dccsct_section *) psip; +} -- cgit v1.2.3