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-rw-r--r--lib/libucsi/atsc/dccsct_section.c109
1 files changed, 109 insertions, 0 deletions
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 <libucsi/atsc/dccsct_section.h>
+
+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;
+}