drivers/net/hamradio/mkiss.h

   1 /****************************************************************************
   2  *      Defines for the Multi-KISS driver.
   3  ****************************************************************************/
   4
   5 #define AX25_MAXDEV     16              /* MAX number of AX25 channels;
   6                                            This can be overridden with
   7                                            insmod -oax25_maxdev=nnn     */
   8 #define AX_MTU          236
   9
  10 /* SLIP/KISS protocol characters. */
  11 #define END             0300            /* indicates end of frame       */
  12 #define ESC             0333            /* indicates byte stuffing      */
  13 #define ESC_END         0334            /* ESC ESC_END means END 'data' */
  14 #define ESC_ESC         0335            /* ESC ESC_ESC means ESC 'data' */
  15
  16 struct ax_disp {
  17         int                magic;
  18
  19         /* Various fields. */
  20         struct tty_struct  *tty;                /* ptr to TTY structure         */
  21         struct net_device      *dev;            /* easy for intr handling       */
  22
  23         /* These are pointers to the malloc()ed frame buffers. */
  24         unsigned char      *rbuff;              /* receiver buffer              */
  25         int                rcount;              /* received chars counter       */
  26         unsigned char      *xbuff;              /* transmitter buffer           */
  27         unsigned char      *xhead;              /* pointer to next byte to XMIT */
  28         int                xleft;               /* bytes left in XMIT queue     */
  29
  30         /* SLIP interface statistics. */
  31         unsigned long      rx_packets;          /* inbound frames counter       */
  32         unsigned long      tx_packets;          /* outbound frames counter      */
  33         unsigned long      rx_bytes;            /* inbound bytes counter        */
  34         unsigned long      tx_bytes;            /* outbound bytes counter       */
  35         unsigned long      rx_errors;           /* Parity, etc. errors          */
  36         unsigned long      tx_errors;           /* Planned stuff                */
  37         unsigned long      rx_dropped;          /* No memory for skb            */
  38         unsigned long      tx_dropped;          /* When MTU change              */
  39         unsigned long      rx_over_errors;      /* Frame bigger then SLIP buf.  */
  40
  41         /* Detailed SLIP statistics. */
  42         int                 mtu;                /* Our mtu (to spot changes!)   */
  43         int                 buffsize;           /* Max buffers sizes            */
  44
  45
  46         unsigned long   flags;          /* Flag values/ mode etc        */
  47                                         /* long req'd: used by set_bit --RR */
  48 #define AXF_INUSE       0               /* Channel in use               */
  49 #define AXF_ESCAPE      1               /* ESC received                 */
  50 #define AXF_ERROR       2               /* Parity, etc. error           */
  51 #define AXF_KEEPTEST    3               /* Keepalive test flag          */
  52 #define AXF_OUTWAIT     4               /* is outpacket was flag        */
  53
  54         int                 mode;
  55         int                 crcmode;    /* MW: for FlexNet, SMACK etc.  */
  56 #define CRC_MODE_NONE   0
  57 #define CRC_MODE_FLEX   1
  58 #define CRC_MODE_SMACK  2
  59         spinlock_t          buflock;    /* lock for rbuf and xbuf */
  60 };
  61
  62 #define AX25_MAGIC              0x5316