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#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 */