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Functions
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.