2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Checksumming functions for IPv6
8 * Authors: Jorge Cwik, <jorge@laser.satlink.net>
9 * Arnt Gulbrandsen, <agulbra@nvg.unit.no>
10 * Borrows very liberally from tcp.c and ip.c, see those
11 * files for more names.
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
22 * Ralf Baechle : generic ipv6 checksum
23 * <ralf@waldorf-gmbh.de>
26 #ifndef _CHECKSUM_IPV6_H
27 #define _CHECKSUM_IPV6_H
29 #include <asm/types.h>
30 #include <asm/byteorder.h>
32 #include <asm/checksum.h>
33 #include <linux/in6.h>
35 #ifndef _HAVE_ARCH_IPV6_CSUM
37 static __inline__ __sum16
csum_ipv6_magic(const struct in6_addr
*saddr
,
38 const struct in6_addr
*daddr
,
39 __u32 len
, unsigned short proto
,
46 __u32 sum
= (__force u32
)csum
;
48 sum
+= (__force u32
)saddr
->s6_addr32
[0];
49 carry
= (sum
< (__force u32
)saddr
->s6_addr32
[0]);
52 sum
+= (__force u32
)saddr
->s6_addr32
[1];
53 carry
= (sum
< (__force u32
)saddr
->s6_addr32
[1]);
56 sum
+= (__force u32
)saddr
->s6_addr32
[2];
57 carry
= (sum
< (__force u32
)saddr
->s6_addr32
[2]);
60 sum
+= (__force u32
)saddr
->s6_addr32
[3];
61 carry
= (sum
< (__force u32
)saddr
->s6_addr32
[3]);
64 sum
+= (__force u32
)daddr
->s6_addr32
[0];
65 carry
= (sum
< (__force u32
)daddr
->s6_addr32
[0]);
68 sum
+= (__force u32
)daddr
->s6_addr32
[1];
69 carry
= (sum
< (__force u32
)daddr
->s6_addr32
[1]);
72 sum
+= (__force u32
)daddr
->s6_addr32
[2];
73 carry
= (sum
< (__force u32
)daddr
->s6_addr32
[2]);
76 sum
+= (__force u32
)daddr
->s6_addr32
[3];
77 carry
= (sum
< (__force u32
)daddr
->s6_addr32
[3]);
80 ulen
= (__force u32
)htonl((__u32
) len
);
85 uproto
= (__force u32
)htonl(proto
);
87 carry
= (sum
< uproto
);
90 return csum_fold((__force __wsum
)sum
);
This page took 0.032529 seconds and 5 git commands to generate.