diff --git a/include/linux/lapb.h b/include/linux/lapb.h
new file mode 100644
index 0000000..eb56472
--- /dev/null
+++ b/include/linux/lapb.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * These are the public elements of the Linux LAPB module.
+ */
+
+#ifndef	LAPB_KERNEL_H
+#define	LAPB_KERNEL_H
+
+#define	LAPB_OK			0
+#define	LAPB_BADTOKEN		1
+#define	LAPB_INVALUE		2
+#define	LAPB_CONNECTED		3
+#define	LAPB_NOTCONNECTED	4
+#define	LAPB_REFUSED		5
+#define	LAPB_TIMEDOUT		6
+#define	LAPB_NOMEM		7
+
+#define	LAPB_STANDARD		0x00
+#define	LAPB_EXTENDED		0x01
+
+#define	LAPB_SLP		0x00
+#define	LAPB_MLP		0x02
+
+#define	LAPB_DTE		0x00
+#define	LAPB_DCE		0x04
+
+struct lapb_register_struct {
+	void (*connect_confirmation)(struct net_device *dev, int reason);
+	void (*connect_indication)(struct net_device *dev, int reason);
+	void (*disconnect_confirmation)(struct net_device *dev, int reason);
+	void (*disconnect_indication)(struct net_device *dev, int reason);
+	int  (*data_indication)(struct net_device *dev, struct sk_buff *skb);
+	void (*data_transmit)(struct net_device *dev, struct sk_buff *skb);
+};
+
+struct lapb_parms_struct {
+	unsigned int t1;
+	unsigned int t1timer;
+	unsigned int t2;
+	unsigned int t2timer;
+	unsigned int n2;
+	unsigned int n2count;
+	unsigned int window;
+	unsigned int state;
+	unsigned int mode;
+};
+
+extern int lapb_register(struct net_device *dev,
+			 const struct lapb_register_struct *callbacks);
+extern int lapb_unregister(struct net_device *dev);
+extern int lapb_getparms(struct net_device *dev, struct lapb_parms_struct *parms);
+extern int lapb_setparms(struct net_device *dev, struct lapb_parms_struct *parms);
+extern int lapb_connect_request(struct net_device *dev);
+extern int lapb_disconnect_request(struct net_device *dev);
+extern int lapb_data_request(struct net_device *dev, struct sk_buff *skb);
+extern int lapb_data_received(struct net_device *dev, struct sk_buff *skb);
+
+#endif