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-rw-r--r--include/linux/netfilter.h26
1 files changed, 21 insertions, 5 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 707bb2e53c4e..6ab5e2d6133e 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -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;