blob: e20dd1f9b40a75ed05e52ac7e40de8f3c5e6e151 [file] [log] [blame]
* crc32.h
* See linux/lib/crc32.c for license and changes
#ifndef _LINUX_CRC32_H
#define _LINUX_CRC32_H
#include <linux/types.h>
#include <linux/bitrev.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);
#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) bitrev32(crc32_le(~0, data, length))
#define ether_crc_le(length, data) crc32_le(~0, data, length)
#endif /* _LINUX_CRC32_H */