checksum.c File Reference

#include <linux/module.h>
#include <linux/errno.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
#include "internal.h"

Go to the source code of this file.

Functions
__sum16	ip_fast_csum (const void *iph, unsigned int ihl)
	EXPORT_SYMBOL (ip_fast_csum)
__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 (const void *src, void *dst, int len, __wsum sum)
	EXPORT_SYMBOL (csum_partial_copy)
__wsum	csum_partial_copy_nocheck (const void *src, void *dst, int len, __wsum sum)
	EXPORT_SYMBOL (csum_partial_copy_nocheck)
__wsum	csum_partial_copy_from_user (const void *src, void *dst, int len, __wsum sum, int *err_ptr)
	EXPORT_SYMBOL (csum_partial_copy_from_user)
__wsum	csum_and_copy_to_user (const void *src, void *dst, int len, __wsum sum, int *err_ptr)
	EXPORT_SYMBOL (csum_and_copy_to_user)

Function Documentation

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

Definition at line 86 of file checksum.c.

__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 36 of file checksum.c.

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

Definition at line 54 of file checksum.c.

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

Definition at line 70 of file checksum.c.

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

Definition at line 61 of file checksum.c.

EXPORT_SYMBOL

(

ip_fast_csum

)

EXPORT_SYMBOL

(

csum_partial

)

EXPORT_SYMBOL

(

ip_compute_csum

)

EXPORT_SYMBOL

(

csum_partial_copy

)

EXPORT_SYMBOL

(

csum_partial_copy_nocheck

)

EXPORT_SYMBOL

(

csum_partial_copy_from_user

)

EXPORT_SYMBOL

(

csum_and_copy_to_user

)

__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 48 of file checksum.c.

__sum16 ip_fast_csum	(	const void *	iph,
		unsigned int	ihl
	)

Definition at line 30 of file checksum.c.