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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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 */