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)
__wsum	csum_tcpudp_nofold (__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, __wsum sum)
	EXPORT_SYMBOL (csum_tcpudp_nofold)
__sum16	ip_fast_csum (const void *iph, unsigned int ihl)
__wsum	csum_partial (const void *buff, int len, __wsum sum)
	EXPORT_SYMBOL (csum_partial)
__sum16	ip_compute_csum (const void *buff, int len)

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 164 of file checksum.c.

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

Definition at line 44 of file checksum.c.

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

Definition at line 54 of file checksum.c.

EXPORT_SYMBOL

(

csum_tcpudp_nofold

)

EXPORT_SYMBOL

(

csum_partial

)

__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 181 of file checksum.c.

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

Definition at line 147 of file checksum.c.