linux/drivers/net/wan/x25_asy.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

50 lines
1.6 KiB
C

#ifndef _LINUX_X25_ASY_H
#define _LINUX_X25_ASY_H
/* X.25 asy configuration. */
#define SL_NRUNIT 256 /* MAX number of X.25 channels;
This can be overridden with
insmod -ox25_asy_maxdev=nnn */
#define SL_MTU 256
/* X25 async protocol characters. */
#define X25_END 0x7E /* indicates end of frame */
#define X25_ESC 0x7D /* indicates byte stuffing */
#define X25_ESCAPE(x) ((x)^0x20)
#define X25_UNESCAPE(x) ((x)^0x20)
struct x25_asy {
int magic;
/* Various fields. */
spinlock_t lock;
struct tty_struct *tty; /* ptr to TTY structure */
struct net_device *dev; /* easy for intr handling */
/* These are pointers to the malloc()ed frame buffers. */
unsigned char *rbuff; /* receiver buffer */
int rcount; /* received chars counter */
unsigned char *xbuff; /* transmitter buffer */
unsigned char *xhead; /* pointer to next byte to XMIT */
int xleft; /* bytes left in XMIT queue */
/* X.25 interface statistics. */
struct net_device_stats stats;
int buffsize; /* Max buffers sizes */
unsigned long flags; /* Flag values/ mode etc */
#define SLF_INUSE 0 /* Channel in use */
#define SLF_ESCAPE 1 /* ESC received */
#define SLF_ERROR 2 /* Parity, etc. error */
#define SLF_OUTWAIT 4 /* Waiting for output */
};
#define X25_ASY_MAGIC 0x5303
extern int x25_asy_init(struct net_device *dev);
#endif /* _LINUX_X25_ASY.H */