tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2003 VIA Networking, Inc. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 *
19 * File: tether.c
20 *
21 * Purpose:
22 *
23 * Author: Tevin Chen
24 *
25 * Date: May 21, 1996
26 *
27 * Functions:
28 * ETHbIsBufferCrc32Ok - Check CRC value of the buffer if Ok or not
29 *
30 * Revision History:
31 *
32 */
33
34#include "device.h"
35#include "tmacro.h"
36#include "tether.h"
37
38/*
39 * Description: Check CRC value of the buffer if Ok or not
40 *
41 * Parameters:
42 * In:
43 * pbyBuffer - pointer of buffer (normally is rx buffer)
44 * cbFrameLength - length of buffer, including CRC portion
45 * Out:
46 * none
47 *
48 * Return Value: true if ok; false if error.
49 *
50 */
51bool ETHbIsBufferCrc32Ok(u8 * pbyBuffer, unsigned int cbFrameLength)
52{
53 u32 n_crc = ~ether_crc_le(cbFrameLength - 4, pbyBuffer);
54
55 if (le32_to_cpu(*((__le32 *)(pbyBuffer + cbFrameLength - 4))) != n_crc)
56 return false;
57
58 return true;
59}
60