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| author | Patrick McHardy <kaber@trash.net> | 2007-11-30 01:14:30 +1100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:55:14 -0800 |
| commit | a99a00cf1adef2d3dce745c93c9cc8b0a1612c50 (patch) | |
| tree | 4629669029f845ae141693578a899505cde577e9 /include/net/checksum.h | |
| parent | 3159afe0d2c1994392c269cf9dee2797830d016b (diff) | |
| download | linux-a99a00cf1adef2d3dce745c93c9cc8b0a1612c50.tar.gz linux-a99a00cf1adef2d3dce745c93c9cc8b0a1612c50.tar.xz | |
[NET]: Move netfilter checksum helpers to net/core/utils.c
This allows to get rid of the CONFIG_NETFILTER dependency of NET_ACT_NAT.
This patch redefines the old names to keep the noise low, the next patch
converts all users.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/checksum.h')
| -rw-r--r-- | include/net/checksum.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/net/checksum.h b/include/net/checksum.h index 124246172a88..07602b7fa218 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -93,4 +93,29 @@ static inline __wsum csum_unfold(__sum16 n) } #define CSUM_MANGLED_0 ((__force __sum16)0xffff) + +static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to) +{ + __be32 diff[] = { ~from, to }; + + *sum = csum_fold(csum_partial((char *)diff, sizeof(diff), ~csum_unfold(*sum))); +} + +static inline void csum_replace2(__sum16 *sum, __be16 from, __be16 to) +{ + csum_replace4(sum, (__force __be32)from, (__force __be32)to); +} + +struct sk_buff; +extern void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, + __be32 from, __be32 to, int pseudohdr); + +static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb, + __be16 from, __be16 to, + int pseudohdr) +{ + inet_proto_csum_replace4(sum, skb, (__force __be32)from, + (__force __be32)to, pseudohdr); +} + #endif |