b23e353666
... duh Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Checksumming functions for IPv6
|
|
*
|
|
* Authors: Jorge Cwik, <jorge@laser.satlink.net>
|
|
* Arnt Gulbrandsen, <agulbra@nvg.unit.no>
|
|
* Borrows very liberally from tcp.c and ip.c, see those
|
|
* files for more names.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
/*
|
|
* Fixes:
|
|
*
|
|
* Ralf Baechle : generic ipv6 checksum
|
|
* <ralf@waldorf-gmbh.de>
|
|
*/
|
|
|
|
#ifndef _CHECKSUM_IPV6_H
|
|
#define _CHECKSUM_IPV6_H
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/byteorder.h>
|
|
#include <net/ip.h>
|
|
#include <asm/checksum.h>
|
|
#include <linux/in6.h>
|
|
|
|
#ifndef _HAVE_ARCH_IPV6_CSUM
|
|
|
|
static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
|
|
const struct in6_addr *daddr,
|
|
__u32 len, unsigned short proto,
|
|
__wsum csum)
|
|
{
|
|
|
|
int carry;
|
|
__u32 ulen;
|
|
__u32 uproto;
|
|
__u32 sum = (__force u32)csum;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[0];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[0]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[1];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[1]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[2];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[2]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[3];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[3]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[0];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[0]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[1];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[1]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[2];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[2]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[3];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[3]);
|
|
sum += carry;
|
|
|
|
ulen = (__force u32)htonl((__u32) len);
|
|
sum += ulen;
|
|
carry = (sum < ulen);
|
|
sum += carry;
|
|
|
|
uproto = (__force u32)htonl(proto);
|
|
sum += uproto;
|
|
carry = (sum < uproto);
|
|
sum += carry;
|
|
|
|
return csum_fold((__force __wsum)sum);
|
|
}
|
|
|
|
#endif
|
|
#endif
|