crc16.c File Reference

#include <stdint.h>
#include <stddef.h>
#include "crc16.h"

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Functions
uint16_t	fr_crc16_xmodem (uint8_t const *in, size_t in_len)
	CRC16 implementation according to CCITT standards.

Variables
static uint16_t const	crc16_table [256]

Function Documentation

fr_crc16_xmodem()

uint16_t fr_crc16_xmodem	(	uint8_t const *	in,
		size_t	in_len
	)

CRC16 implementation according to CCITT standards.

Note by antirez: this is actually the XMODEM CRC 16 algorithm, using the following parameters:

Name : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN" Width : 16 bit Poly : 1021 (That is actually x^16 + x^12 + x^5 + 1) Initialization : 0000 Reflect Input byte : False Reflect Output CRC : False Xor constant to output CRC : 0000 Output for "123456789" : 31C3

Copyright

2001-2010 Georges Menie (www.menie.org)

2010 Salvatore Sanfilippo (adapted to Redis coding style)

2015 Arran Cudbard-Bell (adapted to FreeRADIUS coding style)

Parameters

[in]	in	Data to perform CRC on.
[in]	in_len	Length of data.

Returns

CRC16 of input data.

Definition at line 91 of file crc16.c.

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Variable Documentation

crc16_table

uint16_t const crc16_table[256]

static

Definition at line 34 of file crc16.c.