net/irda/irnet/irnet_ppp.h

   1 /*
   2  *      IrNET protocol module : Synchronous PPP over an IrDA socket.
   3  *
   4  *              Jean II - HPL `00 - <jt@hpl.hp.com>
   5  *
   6  * This file contains all definitions and declarations necessary for the
   7  * PPP part of the IrNET module.
   8  * This file is a private header, so other modules don't want to know
   9  * what's in there...
  10  */
  11
  12 #ifndef IRNET_PPP_H
  13 #define IRNET_PPP_H
  14
  15 /***************************** INCLUDES *****************************/
  16
  17 #include "irnet.h"              /* Module global include */
  18
  19 /************************ CONSTANTS & MACROS ************************/
  20
  21 /* /dev/irnet file constants */
  22 #define IRNET_MAJOR     10      /* Misc range */
  23 #define IRNET_MINOR     187     /* Official allocation */
  24
  25 /* IrNET control channel stuff */
  26 #define IRNET_MAX_COMMAND       256     /* Max length of a command line */
  27
  28 /* PPP hardcore stuff */
  29
  30 /* Bits in rbits (PPP flags in irnet struct) */
  31 #define SC_RCV_BITS     (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
  32
  33 /* Bit numbers in busy */
  34 #define XMIT_BUSY       0
  35 #define RECV_BUSY       1
  36 #define XMIT_WAKEUP     2
  37 #define XMIT_FULL       3
  38
  39 /* Queue management */
  40 #define PPPSYNC_MAX_RQLEN       32      /* arbitrary */
  41
  42 /****************************** TYPES ******************************/
  43
  44
  45 /**************************** PROTOTYPES ****************************/
  46
  47 /* ----------------------- CONTROL CHANNEL ----------------------- */
  48 static inline ssize_t
  49         irnet_ctrl_write(irnet_socket *,
  50                          const char *,
  51                          size_t);
  52 static inline ssize_t
  53         irnet_ctrl_read(irnet_socket *,
  54                         struct file *,
  55                         char *,
  56                         size_t);
  57 static inline unsigned int
  58         irnet_ctrl_poll(irnet_socket *,
  59                         struct file *,
  60                         poll_table *);
  61 /* ----------------------- CHARACTER DEVICE ----------------------- */
  62 static int
  63         dev_irnet_open(struct inode *,  /* fs callback : open */
  64                        struct file *),
  65         dev_irnet_close(struct inode *,
  66                         struct file *);
  67 static ssize_t
  68         dev_irnet_write(struct file *,
  69                         const char *,
  70                         size_t,
  71                         loff_t *),
  72         dev_irnet_read(struct file *,
  73                        char *,
  74                        size_t,
  75                        loff_t *);
  76 static unsigned int
  77         dev_irnet_poll(struct file *,
  78                        poll_table *);
  79 static int
  80         dev_irnet_ioctl(struct inode *,
  81                         struct file *,
  82                         unsigned int,
  83                         unsigned long);
  84 /* ------------------------ PPP INTERFACE ------------------------ */
  85 static inline struct sk_buff *
  86         irnet_prepare_skb(irnet_socket *,
  87                           struct sk_buff *);
  88 static int
  89         ppp_irnet_send(struct ppp_channel *,
  90                       struct sk_buff *);
  91 static int
  92         ppp_irnet_ioctl(struct ppp_channel *,
  93                         unsigned int,
  94                         unsigned long);
  95
  96 /**************************** VARIABLES ****************************/
  97
  98 /* Filesystem callbacks (to call us) */
  99 static struct file_operations irnet_device_fops =
 100 {
 101   read:         dev_irnet_read,
 102   write:        dev_irnet_write,
 103   poll:         dev_irnet_poll,
 104   ioctl:        dev_irnet_ioctl,
 105   open:         dev_irnet_open,
 106   release:      dev_irnet_close
 107   /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
 108 };
 109
 110 /* Structure so that the misc major (drivers/char/misc.c) take care of us... */
 111 static struct miscdevice irnet_misc_device =
 112 {
 113         IRNET_MINOR,
 114         "irnet",
 115         &irnet_device_fops
 116 };
 117
 118 /* Generic PPP callbacks (to call us) */
 119 struct ppp_channel_ops irnet_ppp_ops =
 120 {
 121   ppp_irnet_send,
 122   ppp_irnet_ioctl
 123 };
 124
 125 #endif /* IRNET_PPP_H */