From Weston Schmidt:

Update packet-mpeg-sect to support CRCs & simpler header processing for subdissectors.

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6941

svn path=/trunk/; revision=41523

1 files changed, 30 insertions, 0 deletions

diff --git a/epan/crc32-tvb.c b/epan/crc32-tvb.c
index 91cd7c13f2..7df0f38520 100644
--- a/epan/crc32-tvb.c
+++ b/epan/crc32-tvb.c
@@ -105,3 +105,33 @@ crc32_802_tvb(tvbuff_t *tvb, guint len)
 
 	return ( c_crc );
 }
+
+guint32
+crc32_mpeg2_tvb_offset_seed(tvbuff_t *tvb, guint offset,
+                                       guint len, guint32 seed)
+{
+	const guint8* buf;
+
+	tvb_ensure_bytes_exist(tvb, offset, len);  /* len == -1 not allowed */
+	buf = tvb_get_ptr(tvb, offset, len);
+
+	return ( crc32_mpeg2_seed(buf, len, seed) );
+}
+
+guint32
+crc32_mpeg2_tvb(tvbuff_t *tvb, guint len)
+{
+    return ( crc32_mpeg2_tvb_offset_seed(tvb, 0, len, CRC32_MPEG2_SEED) );
+}
+
+guint32
+crc32_mpeg2_tvb_offset(tvbuff_t *tvb, guint offset, guint len)
+{
+    return ( crc32_mpeg2_tvb_offset_seed(tvb, offset, len, CRC32_MPEG2_SEED) );
+}
+
+guint32
+crc32_mpeg2_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed)
+{
+    return ( crc32_mpeg2_tvb_offset_seed(tvb, 0, len, seed) );
+}