78 строки
2.2 KiB
C
78 строки
2.2 KiB
C
#ifndef _ALPHA_CHECKSUM_H
|
|
#define _ALPHA_CHECKSUM_H
|
|
|
|
#include <linux/in6.h>
|
|
|
|
/*
|
|
* This is a version of ip_compute_csum() optimized for IP headers,
|
|
* which always checksum on 4 octet boundaries.
|
|
*/
|
|
extern unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl);
|
|
|
|
/*
|
|
* computes the checksum of the TCP/UDP pseudo-header
|
|
* returns a 16-bit checksum, already complemented
|
|
*/
|
|
extern unsigned short int csum_tcpudp_magic(unsigned long saddr,
|
|
unsigned long daddr,
|
|
unsigned short len,
|
|
unsigned short proto,
|
|
unsigned int sum);
|
|
|
|
unsigned int csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
|
|
unsigned short len, unsigned short proto,
|
|
unsigned int 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 unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
|
|
|
|
/*
|
|
* the same as csum_partial, but copies from src while it
|
|
* checksums
|
|
*
|
|
* here even more important to align src and dst on a 32-bit (or even
|
|
* better 64-bit) boundary
|
|
*/
|
|
unsigned int csum_partial_copy_from_user(const char __user *src, char *dst, int len, unsigned int sum, int *errp);
|
|
|
|
unsigned int csum_partial_copy_nocheck(const char *src, char *dst, int len, unsigned int sum);
|
|
|
|
|
|
/*
|
|
* this routine is used for miscellaneous IP-like checksums, mainly
|
|
* in icmp.c
|
|
*/
|
|
|
|
extern unsigned short ip_compute_csum(unsigned char * buff, int len);
|
|
|
|
/*
|
|
* Fold a partial checksum without adding pseudo headers
|
|
*/
|
|
|
|
static inline unsigned short csum_fold(unsigned int sum)
|
|
{
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
return ~sum;
|
|
}
|
|
|
|
#define _HAVE_ARCH_IPV6_CSUM
|
|
extern unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
|
|
struct in6_addr *daddr,
|
|
__u32 len,
|
|
unsigned short proto,
|
|
unsigned int sum);
|
|
|
|
#endif
|