/* * 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 */