LXR linux/drivers/net/wan/x25

   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  int                   buffsize;       /* Max buffers sizes            */
  32
  33  unsigned long         flags;          /* Flag values/ mode etc        */
  34#define SLF_INUSE       0               /* Channel in use               */
  35#define SLF_ESCAPE      1               /* ESC received                 */
  36#define SLF_ERROR       2               /* Parity, etc. error           */
  37#define SLF_OUTWAIT     4               /* Waiting for output           */
  38};
  39
  40
  41
  42#define X25_ASY_MAGIC 0x5303
  43
  44extern int x25_asy_init(struct net_device *dev);
  45
  46#endif  /* _LINUX_X25_ASY.H */
  47