1#ifndef _LINUX_X25_ASY_H
2#define _LINUX_X25_ASY_H
3
4/* X.25 asy configuration. */
5#define SL_NRUNIT	256		/* MAX number of X.25 channels;
6					   This can be overridden with
7					   insmod -ox25_asy_maxdev=nnn	*/
8#define SL_MTU		256
9
10/* X25 async protocol characters. */
11#define X25_END         0x7E		/* indicates end of frame	*/
12#define X25_ESC         0x7D		/* indicates byte stuffing	*/
13#define X25_ESCAPE(x)	((x)^0x20)
14#define X25_UNESCAPE(x)	((x)^0x20)
15
16
17struct x25_asy {
18  int			magic;
19
20  /* Various fields. */
21  spinlock_t		lock;
22  struct tty_struct	*tty;		/* ptr to TTY structure		*/
23  struct net_device	*dev;		/* easy for intr handling	*/
24
25  /* These are pointers to the malloc()ed frame buffers. */
26  unsigned char		*rbuff;		/* receiver buffer		*/
27  int                   rcount;         /* received chars counter       */
28  unsigned char		*xbuff;		/* transmitter buffer		*/
29  unsigned char         *xhead;         /* pointer to next byte to XMIT */
30  int                   xleft;          /* bytes left in XMIT queue     */
31
32  /* X.25 interface statistics. */
33  struct net_device_stats stats;
34
35  int                   buffsize;       /* Max buffers sizes            */
36
37  unsigned long		flags;		/* Flag values/ mode etc	*/
38#define SLF_INUSE	0		/* Channel in use               */
39#define SLF_ESCAPE	1               /* ESC received                 */
40#define SLF_ERROR	2               /* Parity, etc. error           */
41#define SLF_OUTWAIT	4		/* Waiting for output		*/
42};
43
44
45
46#define X25_ASY_MAGIC 0x5303
47
48extern int x25_asy_init(struct net_device *dev);
49
50#endif	/* _LINUX_X25_ASY.H */
51