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authoretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
committeretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
commitab959d7b4194715870128e616b8e29d4a101e488 (patch)
tree61a746231d30817be73416a7d67763fd677a1042 /lib/libucsi/dvb/nit_section.c
parent6b350466c4902c5b137e0efaf1d189128a7f18f5 (diff)
downloadlinux-dvb-apps-ab959d7b4194715870128e616b8e29d4a101e488.tar.gz
Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207
Diffstat (limited to 'lib/libucsi/dvb/nit_section.c')
-rw-r--r--lib/libucsi/dvb/nit_section.c78
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;
+}