ip6_checksum.h (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) ip6_checksum.h (56649d5d3c4cb0fe6dd34808ca9f9208d84130ab)
1/*
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.
5 *
6 * Checksumming functions for IPv6
7 *
8 * Authors: Jorge Cwik, <jorge@laser.satlink.net>

--- 20 unchanged lines hidden (view full) ---

29#include <asm/types.h>
30#include <asm/byteorder.h>
31#include <net/ip.h>
32#include <asm/checksum.h>
33#include <linux/in6.h>
34
35#ifndef _HAVE_ARCH_IPV6_CSUM
36
1/*
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.
5 *
6 * Checksumming functions for IPv6
7 *
8 * Authors: Jorge Cwik, <jorge@laser.satlink.net>

--- 20 unchanged lines hidden (view full) ---

29#include <asm/types.h>
30#include <asm/byteorder.h>
31#include <net/ip.h>
32#include <asm/checksum.h>
33#include <linux/in6.h>
34
35#ifndef _HAVE_ARCH_IPV6_CSUM
36
37static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
38 struct in6_addr *daddr,
39 __u16 len,
40 unsigned short proto,
41 unsigned int csum)
37static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
38 const struct in6_addr *daddr,
39 __u32 len, unsigned short proto,
40 __wsum csum)
42{
43
44 int carry;
45 __u32 ulen;
46 __u32 uproto;
41{
42
43 int carry;
44 __u32 ulen;
45 __u32 uproto;
46 __u32 sum = (__force u32)csum;
47
47
48 csum += saddr->s6_addr32[0];
49 carry = (csum < saddr->s6_addr32[0]);
50 csum += carry;
48 sum += (__force u32)saddr->s6_addr32[0];
49 carry = (sum < (__force u32)saddr->s6_addr32[0]);
50 sum += carry;
51
51
52 csum += saddr->s6_addr32[1];
53 carry = (csum < saddr->s6_addr32[1]);
54 csum += carry;
52 sum += (__force u32)saddr->s6_addr32[1];
53 carry = (sum < (__force u32)saddr->s6_addr32[1]);
54 sum += carry;
55
55
56 csum += saddr->s6_addr32[2];
57 carry = (csum < saddr->s6_addr32[2]);
58 csum += carry;
56 sum += (__force u32)saddr->s6_addr32[2];
57 carry = (sum < (__force u32)saddr->s6_addr32[2]);
58 sum += carry;
59
59
60 csum += saddr->s6_addr32[3];
61 carry = (csum < saddr->s6_addr32[3]);
62 csum += carry;
60 sum += (__force u32)saddr->s6_addr32[3];
61 carry = (sum < (__force u32)saddr->s6_addr32[3]);
62 sum += carry;
63
63
64 csum += daddr->s6_addr32[0];
65 carry = (csum < daddr->s6_addr32[0]);
66 csum += carry;
64 sum += (__force u32)daddr->s6_addr32[0];
65 carry = (sum < (__force u32)daddr->s6_addr32[0]);
66 sum += carry;
67
67
68 csum += daddr->s6_addr32[1];
69 carry = (csum < daddr->s6_addr32[1]);
70 csum += carry;
68 sum += (__force u32)daddr->s6_addr32[1];
69 carry = (sum < (__force u32)daddr->s6_addr32[1]);
70 sum += carry;
71
71
72 csum += daddr->s6_addr32[2];
73 carry = (csum < daddr->s6_addr32[2]);
74 csum += carry;
72 sum += (__force u32)daddr->s6_addr32[2];
73 carry = (sum < (__force u32)daddr->s6_addr32[2]);
74 sum += carry;
75
75
76 csum += daddr->s6_addr32[3];
77 carry = (csum < daddr->s6_addr32[3]);
78 csum += carry;
76 sum += (__force u32)daddr->s6_addr32[3];
77 carry = (sum < (__force u32)daddr->s6_addr32[3]);
78 sum += carry;
79
79
80 ulen = htonl((__u32) len);
81 csum += ulen;
82 carry = (csum < ulen);
83 csum += carry;
80 ulen = (__force u32)htonl((__u32) len);
81 sum += ulen;
82 carry = (sum < ulen);
83 sum += carry;
84
84
85 uproto = htonl(proto);
86 csum += uproto;
87 carry = (csum < uproto);
88 csum += carry;
85 uproto = (__force u32)htonl(proto);
86 sum += uproto;
87 carry = (sum < uproto);
88 sum += carry;
89
89
90 return csum_fold(csum);
90 return csum_fold((__force __wsum)csum);
91}
92
93#endif
94#endif
91}
92
93#endif
94#endif