1 files changed, 78 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/nit_section.c b/lib/libucsi/dvb/nit_section.c
new file mode 100644
index 0000000..664a0cb
--- /dev/null
+++ b/lib/libucsi/dvb/nit_section.c
@@ -0,0 +1,78 @@
+/*
+ * 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/dvb/nit_section.h>
+
+struct dvb_nit_section *dvb_nit_section_codec(struct section_ext * ext)
+{
+	uint8_t * buf = (uint8_t *) ext;
+	struct dvb_nit_section * ret = (struct dvb_nit_section *) ext;
+	size_t pos = sizeof(struct section_ext);
+	size_t len = section_ext_length(ext);
+
+	if (len < sizeof(struct dvb_nit_section))
+		return NULL;
+
+	bswap16(buf + pos);
+	pos += 2;
+
+	if ((pos + ret->network_descriptors_length) > len)
+		return NULL;
+
+	if (verify_descriptors(buf + pos, ret->network_descriptors_length))
+		return NULL;
+
+	pos += ret->network_descriptors_length;
+
+	if ((pos + sizeof(struct dvb_nit_section_part2)) > len)
+		return NULL;
+
+	bswap16(buf + pos);
+	pos += 2;
+
+	while (pos < len) {
+		struct dvb_nit_transport *transport =
+			(struct dvb_nit_transport *)(buf + pos);
+
+		if ((pos + sizeof(struct dvb_nit_transport)) > len)
+			return NULL;
+
+		bswap16(buf + pos);
+		bswap16(buf + pos + 2);
+		bswap16(buf + pos + 4);
+
+		pos += sizeof(struct dvb_nit_transport);
+
+		if ((pos + transport->transport_descriptors_length) > len)
+			return NULL;
+
+		if (verify_descriptors(buf + pos,
+					transport->transport_descriptors_length))
+			return NULL;
+
+		pos += transport->transport_descriptors_length;
+	}
+
+	if (pos != len)
+		return NULL;
+
+	return ret;
+}