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  *      Stanislav Voronyi       :       Make line checking as created by
  16  *                                      Igor Chechik, RELCOM Corp.
  17  *
  18  * Author:      Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
  19  */
  20 #ifndef _LINUX_SLIP_H
  21 #define _LINUX_SLIP_H
  22 
  23 #include <linux/config.h>
  24 
  25 #if defined(CONFIG_INET) && defined(CONFIG_SLIP_COMPRESSED)
  26 # define SL_INCLUDE_CSLIP
  27 #endif
  28 
  29 #ifdef SL_INCLUDE_CSLIP
  30 # define SL_MODE_DEFAULT SL_MODE_ADAPTIVE
  31 #else
  32 # define SL_MODE_DEFAULT SL_MODE_SLIP
  33 #endif
  34 
  35 /* SLIP configuration. */
  36 #define SL_NRUNIT       256             /* MAX number of SLIP channels;
  37                                            This can be overridden with
  38                                            insmod -oslip_maxdev=nnn     */
  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 #define SLF_KEEPTEST    4               /* Keepalive test flag          */
  93 #define SLF_OUTWAIT     8               /* is outpacket was flag        */
  94 
  95   unsigned char         mode;           /* SLIP mode                    */
  96 #define SL_MODE_SLIP    0
  97 #define SL_MODE_CSLIP   1
  98 #define SL_MODE_SLIP6   2               /* Matt Dillon's printable slip */
  99 #define SL_MODE_CSLIP6  (SL_MODE_SLIP6|SL_MODE_CSLIP)
 100 #define SL_MODE_AX25    4
 101 #define SL_MODE_ADAPTIVE 8
 102 #ifdef CONFIG_SLIP_SMART  
 103   unsigned char         outfill;        /* # of sec betwen outfill packet */
 104   unsigned char         keepalive;      /* keepalive seconds            */
 105   struct timer_list     outfill_timer;
 106   struct timer_list     keepalive_timer;
 107 #endif  
 108 };
 109 
 110 
 111 
 112 #define SLIP_MAGIC 0x5302
 113 
 114 extern int slip_init(struct device *dev);
 115 
 116 #endif  /* _LINUX_SLIP.H */
/* */
root/drivers/net/slip.h

INCLUDED FROM
