You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.6 KiB
95 lines
2.6 KiB
#ifndef __ASM_SH64_CHECKSUM_H
|
|
#define __ASM_SH64_CHECKSUM_H
|
|
|
|
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* include/asm-sh64/checksum.h
|
|
*
|
|
* Copyright (C) 2000, 2001 Paolo Alberelli
|
|
*
|
|
*/
|
|
|
|
#include <asm/registers.h>
|
|
|
|
/*
|
|
* computes the checksum of a memory block at buff, length len,
|
|
* and adds in "sum" (32-bit)
|
|
*
|
|
* returns a 32-bit number suitable for feeding into itself
|
|
* or csum_tcpudp_magic
|
|
*
|
|
* this function must be called with even lengths, except
|
|
* for the last fragment, which may be odd
|
|
*
|
|
* it's best to have buff aligned on a 32-bit boundary
|
|
*/
|
|
asmlinkage unsigned int csum_partial(const unsigned char *buff, int len,
|
|
unsigned int sum);
|
|
|
|
/*
|
|
* Note: when you get a NULL pointer exception here this means someone
|
|
* passed in an incorrect kernel address to one of these functions.
|
|
*
|
|
* If you use these functions directly please don't forget the
|
|
* access_ok().
|
|
*/
|
|
|
|
|
|
unsigned int csum_partial_copy_nocheck(const char *src, char *dst, int len,
|
|
unsigned int sum);
|
|
|
|
unsigned int csum_partial_copy_from_user(const char *src, char *dst,
|
|
int len, int sum, int *err_ptr);
|
|
|
|
/*
|
|
* These are the old (and unsafe) way of doing checksums, a warning message will be
|
|
* printed if they are used and an exeption occurs.
|
|
*
|
|
* these functions should go away after some time.
|
|
*/
|
|
|
|
#define csum_partial_copy_fromuser csum_partial_copy
|
|
|
|
unsigned int csum_partial_copy(const char *src, char *dst, int len,
|
|
unsigned int sum);
|
|
|
|
static inline unsigned short csum_fold(unsigned int sum)
|
|
{
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
return ~(sum);
|
|
}
|
|
|
|
unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl);
|
|
|
|
unsigned long csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
|
|
unsigned short len, unsigned short proto,
|
|
unsigned int sum);
|
|
|
|
/*
|
|
* computes the checksum of the TCP/UDP pseudo-header
|
|
* returns a 16-bit checksum, already complemented
|
|
*/
|
|
static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
|
|
unsigned long daddr,
|
|
unsigned short len,
|
|
unsigned short proto,
|
|
unsigned int sum)
|
|
{
|
|
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
|
|
}
|
|
|
|
/*
|
|
* this routine is used for miscellaneous IP-like checksums, mainly
|
|
* in icmp.c
|
|
*/
|
|
static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
|
|
{
|
|
return csum_fold(csum_partial(buff, len, 0));
|
|
}
|
|
|
|
#endif /* __ASM_SH64_CHECKSUM_H */
|
|
|
|
|