drivers/net/slip.h

/* */
   1 /*
   2  * slip.h       Define the SLIP device driver interface and constants.
   3  *
   4  * NOTE:        THIS FILE WILL BE MOVED TO THE LINUX INCLUDE DIRECTORY
   5  *              AS SOON AS POSSIBLE!
   6  *
   7  * Version:     @(#)slip.h      1.2.0   03/28/93
   8  *
   9  * Fixes:
  10  *              Alan Cox        :       Added slip mtu field.
  11  *              Matt Dillon     :       Printable slip (borrowed from net2e)
  12  *              Alan Cox        :       Added SL_SLIP_LOTS
  13  *      Dmitry Gorodchanin      :       A lot of changes in the 'struct slip'
  14  *      Dmitry Gorodchanin      :       Added CSLIP statistics.
  15  *
  16  * Author:      Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
  17  */
  18 #ifndef _LINUX_SLIP_H
  19 #define _LINUX_SLIP_H
  20 
  21 #include <linux/config.h>
  22 
  23 #if defined(CONFIG_INET) && defined(CONFIG_SLIP_COMPRESSED)
  24 # define SL_INCLUDE_CSLIP
  25 #endif
  26 
  27 #ifdef SL_INCLUDE_CSLIP
  28 # define SL_MODE_DEFAULT SL_MODE_ADAPTIVE
  29 #else
  30 # define SL_MODE_DEFAULT SL_MODE_SLIP
  31 #endif
  32 
  33 /* SLIP configuration. */
  34 #ifndef SL_SLIP_LOTS
  35 #define SL_NRUNIT       4               /* number of SLIP channels      */
  36 #else
  37 #define SL_NRUNIT       16
  38 #endif
  39 #define SL_MTU          296             /* 296; I am used to 600- FvK   */
  40 
  41 /* SLIP protocol characters. */
  42 #define END             0300            /* indicates end of frame       */
  43 #define ESC             0333            /* indicates byte stuffing      */
  44 #define ESC_END         0334            /* ESC ESC_END means END 'data' */
  45 #define ESC_ESC         0335            /* ESC ESC_ESC means ESC 'data' */
  46 
  47 
  48 struct slip {
  49   int                   magic;
  50 
  51   /* Various fields. */
  52   struct tty_struct     *tty;           /* ptr to TTY structure         */
  53   struct device         *dev;           /* easy for intr handling       */
  54 #ifdef SL_INCLUDE_CSLIP
  55   struct slcompress     *slcomp;        /* for header compression       */
  56   unsigned char         *cbuff;         /* compression buffer           */
  57 #endif
  58 
  59   /* These are pointers to the malloc()ed frame buffers. */
  60   unsigned char         *rbuff;         /* receiver buffer              */
  61   int                   rcount;         /* received chars counter       */
  62   unsigned char         *xbuff;         /* transmitter buffer           */
  63   unsigned char         *xhead;         /* pointer to next byte to XMIT */
  64   int                   xleft;          /* bytes left in XMIT queue     */
  65 
  66   /* SLIP interface statistics. */
  67   unsigned long         rx_packets;     /* inbound frames counter       */
  68   unsigned long         tx_packets;     /* outbound frames counter      */
  69   unsigned long         rx_errors;      /* Parity, etc. errors          */
  70   unsigned long         tx_errors;      /* Planned stuff                */
  71   unsigned long         rx_dropped;     /* No memory for skb            */
  72   unsigned long         tx_dropped;     /* When MTU change              */
  73   unsigned long         rx_over_errors; /* Frame bigger then SLIP buf.  */
  74 #ifdef SL_INCLUDE_CSLIP
  75   unsigned long         tx_compressed;
  76   unsigned long         rx_compressed;
  77   unsigned long         tx_misses;
  78 #endif
  79   /* Detailed SLIP statistics. */
  80 
  81   int                   mtu;            /* Our mtu (to spot changes!)   */
  82   int                   buffsize;       /* Max buffers sizes            */
  83 
  84 #ifdef CONFIG_SLIP_MODE_SLIP6
  85   int                   xdata, xbits;   /* 6 bit slip controls          */
  86 #endif
  87 
  88   unsigned char         flags;          /* Flag values/ mode etc        */
  89 #define SLF_INUSE       0               /* Channel in use               */
  90 #define SLF_ESCAPE      1               /* ESC received                 */
  91 #define SLF_ERROR       2               /* Parity, etc. error           */
  92 
  93   unsigned char         mode;           /* SLIP mode                    */
  94 #define SL_MODE_SLIP    0
  95 #define SL_MODE_CSLIP   1
  96 #define SL_MODE_SLIP6   2               /* Matt Dillon's printable slip */
  97 #define SL_MODE_CSLIP6  (SL_MODE_SLIP6|SL_MODE_CSLIP)
  98 #define SL_MODE_AX25    4
  99 #define SL_MODE_ADAPTIVE 8
 100 };
 101 
 102 
 103 
 104 #define SLIP_MAGIC 0x5302
 105 
 106 extern int slip_init(struct device *dev);
 107 
 108 #endif  /* _LINUX_SLIP.H */
/* */
root/drivers/net/slip.h

INCLUDED FROM
