diff options
| author | Guy Harris <guy@alum.mit.edu> | 2014-08-08 08:57:31 -0700 |
|---|---|---|
| committer | Guy Harris <guy@alum.mit.edu> | 2014-08-08 15:58:06 +0000 |
| commit | 22ad90cdc8c4487072e2152cbca8112afaeaa59f (patch) | |
| tree | 868fb343a8dcf01d5ae625f4fa91dc3d3d58c5b1 /epan/crc16-tvb.h | |
| parent | 8da72cd43dcd597c9f03754831d55211a17f077c (diff) | |
Add routines for CRC-16 with a polynomial of 0x3D65.
There are routines that take a buffer and a length and that take a
tvbuff, offset, and length; use those routines in the DNP dissector
(which no longer needs its own table and loop), and use the tvbuff
routine instead of calling tvb_get_ptr().
Change-Id: Ic67b0f3b65b94ea47c0fdc2f3d3b6f88df77f9c6
Reviewed-on: https://code.wireshark.org/review/3505
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'epan/crc16-tvb.h')
| -rw-r--r-- | epan/crc16-tvb.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/epan/crc16-tvb.h b/epan/crc16-tvb.h index f85ae8fc8c..eee19f7597 100644 --- a/epan/crc16-tvb.h +++ b/epan/crc16-tvb.h @@ -115,6 +115,18 @@ WS_DLL_PUBLIC guint16 crc16_plain_tvb_offset_seed(tvbuff_t *tvb, guint offset, g @return The CRC16 checksum. */ WS_DLL_PUBLIC guint16 crc16_0x9949_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint16 seed); +/** Compute CRC16 checksum of a tv buffer using the parameters + * Width = 16 bits + * Poly = 0x3D65 + * Reflection = true + * Algorithm = table-driven + @param tvb The tv buffer containing the data. + @param offset The offset into the tv buffer. + @param len The number of bytes to include in the computation. + @param seed The seed to use. + @return The CRC16 checksum. */ +WS_DLL_PUBLIC guint16 crc16_0x3D65_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint16 seed); + #ifdef __cplusplus } #endif /* __cplusplus */ |