Add more `skb->dst' accessors

index a91e033..6b2dd5e 100644
@@ -99,6 +99,21 @@ static inline void skb_dst_drop(struct sk_buff *skb)
 	skb->dst = NULL;
 }
 
+static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
+{
+	return (struct dst_entry *)skb->dst;
+}
+
+static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
+{
+	skb->dst = (unsigned long)dst;
+}
+
+static inline struct rtable *skb_rtable(const struct sk_buff *skb)
+{
+	return (struct rtable *)skb_dst(skb);
+}
+
 extern int genl_register_family_with_ops(struct genl_family *family,
 	struct genl_ops *ops, size_t n_ops);