netfilter: add helper for adding nat extension

Reduce copy-past a bit by adding a common helper.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/net/netfilter/nf_nat.h b/include/net/netfilter/nf_nat.h
index 07eaaf604092..a71dd333ac68 100644
--- a/include/net/netfilter/nf_nat.h
+++ b/include/net/netfilter/nf_nat.h
@@ -48,6 +48,8 @@ unsigned int nf_nat_setup_info(struct nf_conn *ct,
 extern unsigned int nf_nat_alloc_null_binding(struct nf_conn *ct,
                                               unsigned int hooknum);
 
+struct nf_conn_nat *nf_ct_nat_ext_add(struct nf_conn *ct);
+
 /* Is this tuple already taken? (not by us)*/
 int nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
                       const struct nf_conn *ignored_conntrack);