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/
usr/
src/
linux-headers-3.0.0-14/
arch/
ia64/
include/
asm/
- drwxr-xr-x
|
Viewing file:  checksum.h (2.13 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#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;
}
#define _HAVE_ARCH_IPV6_CSUM 1
struct in6_addr;
extern __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr, __u32 len, unsigned short proto,
__wsum csum);
#endif /* _ASM_IA64_CHECKSUM_H */
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