checksum.c File Reference

#include <net/checksum.h>
#include <linux/module.h>

Go to the source code of this file.

Functions
__wsum	csum_partial (const void *buff, int len, __wsum sum)
	EXPORT_SYMBOL (csum_partial)
__sum16	ip_compute_csum (const void *buff, int len)
	EXPORT_SYMBOL (ip_compute_csum)
__wsum	csum_partial_copy_from_user (const void __user *src, void *dst, int len, __wsum sum, int *csum_err)
	EXPORT_SYMBOL (csum_partial_copy_from_user)
__wsum	csum_partial_copy_nocheck (const void *src, void *dst, int len, __wsum sum)
	EXPORT_SYMBOL (csum_partial_copy_nocheck)

Function Documentation

__wsum csum_partial	(	const void *	buff,
		int	len,
		__wsum	sum
	)

csum_partial - Compute an internet checksum. : buffer to be checksummed : length of buffer. : initial sum to be added in (32bit unfolded)

Returns the 32bit unfolded internet checksum of the buffer. Before filling it in it needs to be csum_fold()'ed. buff should be aligned to a 64bit boundary if possible.

Definition at line 107 of file checksum.c.

__wsum csum_partial_copy_from_user	(	const void __user *	src,
		void *	dst,
		int	len,
		__wsum	sum,
		int *	csum_err
	)

Definition at line 135 of file checksum.c.

__wsum csum_partial_copy_nocheck	(	const void *	src,
		void *	dst,
		int	len,
		__wsum	sum
	)

Definition at line 160 of file checksum.c.

EXPORT_SYMBOL

(

csum_partial

)

EXPORT_SYMBOL

(

ip_compute_csum

)

EXPORT_SYMBOL

(

csum_partial_copy_from_user

)

EXPORT_SYMBOL

(

csum_partial_copy_nocheck

)

__sum16 ip_compute_csum	(	const void *	buff,
		int	len
	)

ip_compute_csum - Compute an 16bit IP checksum. : buffer address. : length of buffer.

Returns the 16bit folded/inverted checksum of the passed buffer. Ready to fill in.

Definition at line 124 of file checksum.c.