checksum.c File Reference

#include <linux/module.h>
#include <linux/string.h>
#include <asm/byteorder.h>

Go to the source code of this file.

Functions
__sum16	csum_tcpudp_magic (__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, __wsum sum)
	EXPORT_SYMBOL (csum_tcpudp_magic)
__wsum	csum_tcpudp_nofold (__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, __wsum sum)
	EXPORT_SYMBOL (csum_tcpudp_nofold)
unsigned long	do_csum (const unsigned char *, long)
__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)

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 79 of file checksum.c.

__sum16 csum_tcpudp_magic	(	__be32	saddr,
		__be32	daddr,
		unsigned short	len,
		unsigned short	proto,
		__wsum	sum
	)

Definition at line 37 of file checksum.c.

__wsum csum_tcpudp_nofold	(	__be32	saddr,
		__be32	daddr,
		unsigned short	len,
		unsigned short	proto,
		__wsum	sum
	)

Definition at line 48 of file checksum.c.

unsigned long do_csum	(	const unsigned char *	,
		long
	)

EXPORT_SYMBOL

(

csum_tcpudp_magic

)

EXPORT_SYMBOL

(

csum_tcpudp_nofold

)

EXPORT_SYMBOL

(

csum_partial

)

EXPORT_SYMBOL

(

ip_compute_csum

)

__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 96 of file checksum.c.