diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/ip6_checksum.h | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'include/net/ip6_checksum.h')
-rw-r--r-- | include/net/ip6_checksum.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/include/net/ip6_checksum.h b/include/net/ip6_checksum.h new file mode 100644 index 000000000000..3dfc885bdf25 --- /dev/null +++ b/include/net/ip6_checksum.h @@ -0,0 +1,94 @@ +/* + * 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 |