Add a tvbuff version of crc6_compute().

Use it in the MBMS synchronisation protocol dissector, rather than
calling tvb_get_ptr() there.

Change-Id: I7ddb3c6b30547826cb5372352c7c483d8a24dc8e
Reviewed-on: https://code.wireshark.org/review/3514
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 38 insertions, 0 deletions

diff --git a/epan/crc6-tvb.h b/epan/crc6-tvb.h
new file mode 100644
index 0000000000..19c5bc691f
--- /dev/null
+++ b/epan/crc6-tvb.h
@@ -0,0 +1,38 @@
+/* crc6-tvb.h
+ * Declaration of CRC-6 tvbuff routines
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __CRC6_TVB_H__
+#define __CRC6_TVB_H__
+
+#include "ws_symbol_export.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+WS_DLL_PUBLIC guint16 crc6_compute_tvb(tvbuff_t *tvb, int len);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* crc6-tvb.h */