322529961e
* sanitize prototypes, annotate * ntohs -> shift in checksum calculations * kill access_ok() in csum_partial_copy_from_user * collapse do_csum_partial_copy_from_user Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
#ifndef _ASM_IA64_CHECKSUM_H
|
|
#define _ASM_IA64_CHECKSUM_H
|
|
|
|
/*
|
|
* Modified 1998, 1999
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
|
|
*/
|
|
|
|
/*
|
|
* This is a version of ip_compute_csum() optimized for IP headers,
|
|
* which always checksum on 4 octet boundaries.
|
|
*/
|
|
extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
|
|
|
|
/*
|
|
* Computes the checksum of the TCP/UDP pseudo-header returns a 16-bit
|
|
* checksum, already complemented
|
|
*/
|
|
extern __sum16 csum_tcpudp_magic (__be32 saddr, __be32 daddr,
|
|
unsigned short len,
|
|
unsigned short proto,
|
|
__wsum sum);
|
|
|
|
extern __wsum csum_tcpudp_nofold (__be32 saddr, __be32 daddr,
|
|
unsigned short len,
|
|
unsigned short proto,
|
|
__wsum sum);
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
extern __wsum csum_partial(const void *buff, int len, __wsum sum);
|
|
|
|
/*
|
|
* Same as csum_partial, but copies from src while it checksums.
|
|
*
|
|
* Here it is even more important to align src and dst on a 32-bit (or
|
|
* even better 64-bit) boundary.
|
|
*/
|
|
extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
|
|
int len, __wsum sum,
|
|
int *errp);
|
|
|
|
extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
|
|
int len, __wsum sum);
|
|
|
|
/*
|
|
* This routine is used for miscellaneous IP-like checksums, mainly in
|
|
* icmp.c
|
|
*/
|
|
extern __sum16 ip_compute_csum(const void *buff, int len);
|
|
|
|
/*
|
|
* Fold a partial checksum without adding pseudo headers.
|
|
*/
|
|
static inline __sum16 csum_fold(__wsum csum)
|
|
{
|
|
u32 sum = (__force u32)csum;
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
return (__force __sum16)~sum;
|
|
}
|
|
|
|
#endif /* _ASM_IA64_CHECKSUM_H */
|