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 #include <linux/miscdevice.h>
  19
  20 /************************ CONSTANTS & MACROS ************************/
  21
  22 /* IrNET control channel stuff */
  23 #define IRNET_MAX_COMMAND       256     /* Max length of a command line */
  24
  25 /* PPP hardcore stuff */
  26
  27 /* Bits in rbits (PPP flags in irnet struct) */
  28 #define SC_RCV_BITS     (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
  29
  30 /* Bit numbers in busy */
  31 #define XMIT_BUSY       0
  32 #define RECV_BUSY       1
  33 #define XMIT_WAKEUP     2
  34 #define XMIT_FULL       3
  35
  36 /* Queue management */
  37 #define PPPSYNC_MAX_RQLEN       32      /* arbitrary */
  38
  39 /****************************** TYPES ******************************/
  40
  41
  42 /**************************** PROTOTYPES ****************************/
  43
  44 /* ----------------------- CONTROL CHANNEL ----------------------- */
  45 static inline ssize_t
  46         irnet_ctrl_write(irnet_socket *,
  47                          const char *,
  48                          size_t);
  49 static inline ssize_t
  50         irnet_ctrl_read(irnet_socket *,
  51                         struct file *,
  52                         char *,
  53                         size_t);
  54 static inline unsigned int
  55         irnet_ctrl_poll(irnet_socket *,
  56                         struct file *,
  57                         poll_table *);
  58 /* ----------------------- CHARACTER DEVICE ----------------------- */
  59 static int
  60         dev_irnet_open(struct inode *,  /* fs callback : open */
  61                        struct file *),
  62         dev_irnet_close(struct inode *,
  63                         struct file *);
  64 static ssize_t
  65         dev_irnet_write(struct file *,
  66                         const char __user *,
  67                         size_t,
  68                         loff_t *),
  69         dev_irnet_read(struct file *,
  70                        char __user *,
  71                        size_t,
  72                        loff_t *);
  73 static unsigned int
  74         dev_irnet_poll(struct file *,
  75                        poll_table *);
  76 static long
  77         dev_irnet_ioctl(struct file *,
  78                         unsigned int,
  79                         unsigned long);
  80 /* ------------------------ PPP INTERFACE ------------------------ */
  81 static inline struct sk_buff *
  82         irnet_prepare_skb(irnet_socket *,
  83                           struct sk_buff *);
  84 static int
  85         ppp_irnet_send(struct ppp_channel *,
  86                       struct sk_buff *);
  87 static int
  88         ppp_irnet_ioctl(struct ppp_channel *,
  89                         unsigned int,
  90                         unsigned long);
  91
  92 /**************************** VARIABLES ****************************/
  93
  94 /* Filesystem callbacks (to call us) */
  95 static const struct file_operations irnet_device_fops =
  96 {
  97         .owner          = THIS_MODULE,
  98         .read           = dev_irnet_read,
  99         .write          = dev_irnet_write,
 100         .poll           = dev_irnet_poll,
 101         .unlocked_ioctl = dev_irnet_ioctl,
 102         .open           = dev_irnet_open,
 103         .release        = dev_irnet_close,
 104         .llseek         = noop_llseek,
 105   /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
 106 };
 107
 108 /* Structure so that the misc major (drivers/char/misc.c) take care of us... */
 109 static struct miscdevice irnet_misc_device =
 110 {
 111         .minor = IRNET_MINOR,
 112         .name = "irnet",
 113         .fops = &irnet_device_fops
 114 };
 115
 116 #endif /* IRNET_PPP_H */