mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
94 lines
2.1 KiB
C
94 lines
2.1 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__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
|
|
struct in6_addr *daddr,
|
|
__u16 len,
|
|
unsigned short proto,
|
|
unsigned int csum)
|
|
{
|
|
|
|
int carry;
|
|
__u32 ulen;
|
|
__u32 uproto;
|
|
|
|
csum += saddr->s6_addr32[0];
|
|
carry = (csum < saddr->s6_addr32[0]);
|
|
csum += carry;
|
|
|
|
csum += saddr->s6_addr32[1];
|
|
carry = (csum < saddr->s6_addr32[1]);
|
|
csum += carry;
|
|
|
|
csum += saddr->s6_addr32[2];
|
|
carry = (csum < saddr->s6_addr32[2]);
|
|
csum += carry;
|
|
|
|
csum += saddr->s6_addr32[3];
|
|
carry = (csum < saddr->s6_addr32[3]);
|
|
csum += carry;
|
|
|
|
csum += daddr->s6_addr32[0];
|
|
carry = (csum < daddr->s6_addr32[0]);
|
|
csum += carry;
|
|
|
|
csum += daddr->s6_addr32[1];
|
|
carry = (csum < daddr->s6_addr32[1]);
|
|
csum += carry;
|
|
|
|
csum += daddr->s6_addr32[2];
|
|
carry = (csum < daddr->s6_addr32[2]);
|
|
csum += carry;
|
|
|
|
csum += daddr->s6_addr32[3];
|
|
carry = (csum < daddr->s6_addr32[3]);
|
|
csum += carry;
|
|
|
|
ulen = htonl((__u32) len);
|
|
csum += ulen;
|
|
carry = (csum < ulen);
|
|
csum += carry;
|
|
|
|
uproto = htonl(proto);
|
|
csum += uproto;
|
|
carry = (csum < uproto);
|
|
csum += carry;
|
|
|
|
return csum_fold(csum);
|
|
}
|
|
|
|
#endif
|
|
#endif
|