void snat_local_in(struct sk_buff *skb);
int snat_pre_route(struct sk_buff *skb);
-void snat_skb(struct datapath *dp, struct sk_buff *skb, int out_port);
+void snat_skb(struct datapath *dp, const struct sk_buff *skb, int out_port);
void snat_maint(struct net_bridge_port *p);
int snat_mod_config(struct datapath *, const struct nx_act_config *);
int snat_free_conf(struct net_bridge_port *p);