+static int tunnel46_rcv(struct sk_buff *skb)
+{
+ struct xfrm6_tunnel *handler;
+
+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+ goto drop;
+
+ for (handler = tunnel46_handlers; handler; handler = handler->next)
+ if (!handler->handler(skb))
+ return 0;
+
+ icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, skb->dev);
+
+drop:
+ kfree_skb(skb);
+ return 0;
+}
+