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[NET]: netfilter checksum annotations

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro
2006-11-14 21:43:23 -08:00
committed by David S. Miller
parent f9214b2627
commit 43bc0ca7ea
13 changed files with 70 additions and 94 deletions
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26
include/linux/netfilter.h
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@@ -282,11 +282,27 @@ extern void nf_invalidate_cache(int pf);
Returns true or false. */
extern int skb_make_writable(struct sk_buff **pskb, unsigned int writable_len);
extern u_int16_t nf_csum_update(u_int32_t oldval, u_int32_t newval,
u_int32_t csum);
extern u_int16_t nf_proto_csum_update(struct sk_buff *skb,
u_int32_t oldval, u_int32_t newval,
u_int16_t csum, int pseudohdr);
static inline void nf_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 nf_csum_replace2(__sum16 *sum, __be16 from, __be16 to)
{
nf_csum_replace4(sum, (__force __be32)from, (__force __be32)to);
}
extern void nf_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
__be32 from, __be32 to, int pseudohdr);
static inline void nf_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb,
__be16 from, __be16 to, int pseudohdr)
{
nf_proto_csum_replace4(sum, skb, (__force __be32)from,
(__force __be32)to, pseudohdr);
}
struct nf_afinfo {
unsigned short family;