CRC32

Functions
void	csp_crc32_gentab (void)
int	csp_crc32_append (csp_packet_t *packet, bool include_header)
int	csp_crc32_verify (csp_packet_t *packet, bool include_header)
uint32_t	csp_crc32_memory (const uint8_t *data, uint32_t length)

Function Documentation

int csp_crc32_append	(	csp_packet_t *	packet,
		bool	include_header
	)

Append CRC32 checksum to packet

Parameters

packet	Packet to append checksum
include_header	use header in calculation (this will not modify the flags field)

Returns

0 on success, -1 on error

void csp_crc32_gentab

(

void

)

Generate precomputed CRC32 table

uint32_t csp_crc32_memory	(	const uint8_t *	data,
		uint32_t	length
	)

Calculate checksum for a given memory area

Parameters

data	pointer to memory
length	length of memory to do checksum on

Returns

return uint32_t checksum

int csp_crc32_verify	(	csp_packet_t *	packet,
		bool	include_header
	)

Verify CRC32 checksum on packet

Parameters

packet	Packet to verify
include_header	use header in calculation (this will not modify the flags field)

Returns

0 if checksum is valid, -1 otherwise