1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * These are the public elements of the Linux LAPB module.
4  */
5 
6 #ifndef	LAPB_KERNEL_H
7 #define	LAPB_KERNEL_H
8 
9 #include <linux/skbuff.h>
10 #include <linux/timer.h>
11 
12 struct net_device;
13 
14 #define	LAPB_OK			0
15 #define	LAPB_BADTOKEN		1
16 #define	LAPB_INVALUE		2
17 #define	LAPB_CONNECTED		3
18 #define	LAPB_NOTCONNECTED	4
19 #define	LAPB_REFUSED		5
20 #define	LAPB_TIMEDOUT		6
21 #define	LAPB_NOMEM		7
22 
23 #define	LAPB_STANDARD		0x00
24 #define	LAPB_EXTENDED		0x01
25 
26 #define	LAPB_SLP		0x00
27 #define	LAPB_MLP		0x02
28 
29 #define	LAPB_DTE		0x00
30 #define	LAPB_DCE		0x04
31 
32 struct lapb_register_struct {
33 	void (*connect_confirmation)(struct net_device *dev, int reason);
34 	void (*connect_indication)(struct net_device *dev, int reason);
35 	void (*disconnect_confirmation)(struct net_device *dev, int reason);
36 	void (*disconnect_indication)(struct net_device *dev, int reason);
37 	int  (*data_indication)(struct net_device *dev, struct sk_buff *skb);
38 	void (*data_transmit)(struct net_device *dev, struct sk_buff *skb);
39 };
40 
41 struct lapb_parms_struct {
42 	unsigned int t1;
43 	unsigned int t1timer;
44 	unsigned int t2;
45 	unsigned int t2timer;
46 	unsigned int n2;
47 	unsigned int n2count;
48 	unsigned int window;
49 	unsigned int state;
50 	unsigned int mode;
51 };
52 
53 extern int lapb_register(struct net_device *dev,
54 			 const struct lapb_register_struct *callbacks);
55 extern int lapb_unregister(struct net_device *dev);
56 extern int lapb_getparms(struct net_device *dev, struct lapb_parms_struct *parms);
57 extern int lapb_setparms(struct net_device *dev, struct lapb_parms_struct *parms);
58 extern int lapb_connect_request(struct net_device *dev);
59 extern int lapb_disconnect_request(struct net_device *dev);
60 extern int lapb_data_request(struct net_device *dev, struct sk_buff *skb);
61 extern int lapb_data_received(struct net_device *dev, struct sk_buff *skb);
62 
63 #endif
64