28 lines
888 B
C
28 lines
888 B
C
/*
|
|
* crc32.h
|
|
* See linux/lib/crc32.c for license and changes
|
|
*/
|
|
#ifndef _LINUX_CRC32_H
|
|
#define _LINUX_CRC32_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len);
|
|
extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len);
|
|
extern u32 bitreverse(u32 in);
|
|
|
|
#define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)data, length)
|
|
|
|
/*
|
|
* Helpers for hash table generation of ethernet nics:
|
|
*
|
|
* Ethernet sends the least significant bit of a byte first, thus crc32_le
|
|
* is used. The output of crc32_le is bit reversed [most significant bit
|
|
* is in bit nr 0], thus it must be reversed before use. Except for
|
|
* nics that bit swap the result internally...
|
|
*/
|
|
#define ether_crc(length, data) bitreverse(crc32_le(~0, data, length))
|
|
#define ether_crc_le(length, data) crc32_le(~0, data, length)
|
|
|
|
#endif /* _LINUX_CRC32_H */
|