checksum.h File Reference

General CRC and checksum computation. More...

#include <byteorder.h>
#include <sys/types.h>

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Defines
#define	IP_CHECKSUM_ZERO   0xFFFFu
	IP checksum value for computed zero checksum.
#define	compute_crc32(seed, data, length)   compute_crc32_le(seed, (uint8_t *) data, length)
	Computes CRC32 value.
Functions
uint32_t	compute_crc32_le (uint32_t seed, uint8_t *data, size_t length)
	Computes CRC32 value in the little-endian environment.
uint32_t	compute_crc32_be (uint32_t seed, uint8_t *data, size_t length)
	Computes CRC32 value in the big-endian environment.
uint32_t	compute_checksum (uint32_t seed, uint8_t *data, size_t length)
	Computes sum of the 2 byte fields.
uint16_t	compact_checksum (uint32_t sum)
	Compacts the computed checksum to the 16 bit number adding the carries.
uint16_t	flip_checksum (uint16_t checksum)
	Returns or flips the checksum if zero.
uint16_t	ip_checksum (uint8_t *data, size_t length)
	Computes the ip header checksum.

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Detailed Description

General CRC and checksum computation.