diff -urN a/include/linux/netdevice.h b/include/linux/netdevice.h
--- a/include/linux/netdevice.h	2022-11-02 20:31:01.672299000 +0800
+++ b/include/linux/netdevice.h	2022-11-02 20:32:30.913335000 +0800
@@ -2562,6 +2562,9 @@
 int register_netdevice_notifier(struct notifier_block *nb);
 int unregister_netdevice_notifier(struct notifier_block *nb);
 
+extern int register_net_in(struct notifier_block *nb); /* Click */
+extern int unregister_net_in(struct notifier_block *nb); /* Click */
+
 struct netdev_notifier_info {
 	struct net_device	*dev;
 	struct netlink_ext_ack	*extack;
diff -urN a/net/core/dev.c b/net/core/dev.c
--- a/net/core/dev.c	2022-11-02 20:31:49.236304000 +0800
+++ b/net/core/dev.c	2022-11-02 20:35:24.110260000 +0800
@@ -270,6 +270,9 @@
 
 static RAW_NOTIFIER_HEAD(netdev_chain);
 
+/* input packet handlers -- might steal packets for Click. */
+static RAW_NOTIFIER_HEAD(net_in_chain);
+
 /*
  *	Device drivers call our routines to queue packets here. We empty the
  *	queue in the local softnet handler.
@@ -1669,6 +1672,25 @@
 }
 EXPORT_SYMBOL(unregister_netdevice_notifier);
 
+int register_net_in(struct notifier_block *nb)
+{
+	int err;
+	rtnl_lock();
+	err = raw_notifier_chain_register(&net_in_chain, nb);
+	rtnl_unlock();
+	return err;
+}
+EXPORT_SYMBOL(register_net_in);
+int unregister_net_in(struct notifier_block *nb)
+{
+	int err;
+	rtnl_lock();
+	err = raw_notifier_chain_unregister(&net_in_chain, nb);
+	rtnl_unlock();
+	return err;
+}
+EXPORT_SYMBOL(unregister_net_in);
+
 /**
  *	call_netdevice_notifiers_info - call all network notifier blocks
  *	@val: value passed unmodified to notifier function
@@ -4848,6 +4870,9 @@
 
 	if (pfmemalloc)
 		goto skip_taps;
+		
+	if(raw_notifier_call_chain(&net_in_chain, 0, skb) & NOTIFY_STOP_MASK)
+	        goto out;
 
 	list_for_each_entry_rcu(ptype, &ptype_all, list) {
 		if (pt_prev)