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[NET]: Move netfilter checksum helpers to net/core/utils.c

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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>
This commit is contained in:
Patrick McHardy
2007-11-30 01:14:30 +11:00
committed by David S. Miller
parent 3159afe0d2
commit a99a00cf1a
4 changed files with 45 additions and 37 deletions
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25
include/net/checksum.h
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@@ -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