CoCalc -- irnet

GitHub Repository: awilliam/linux-vfio
Path: blob/master/net/irda/irnet/irnet_ppp.h
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/*
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 *	IrNET protocol module : Synchronous PPP over an IrDA socket.
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 *
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 *		Jean II - HPL `00 - <[email protected]>
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 *
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 * This file contains all definitions and declarations necessary for the
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 * PPP part of the IrNET module.
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 * This file is a private header, so other modules don't want to know
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 * what's in there...
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 */
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#ifndef IRNET_PPP_H
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#define IRNET_PPP_H
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/***************************** INCLUDES *****************************/
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#include "irnet.h"		/* Module global include */
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/************************ CONSTANTS & MACROS ************************/
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/* /dev/irnet file constants */
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#define IRNET_MAJOR	10	/* Misc range */
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#define IRNET_MINOR	187	/* Official allocation */
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/* IrNET control channel stuff */
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#define IRNET_MAX_COMMAND	256	/* Max length of a command line */
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/* PPP hardcore stuff */
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/* Bits in rbits (PPP flags in irnet struct) */
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#define SC_RCV_BITS	(SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
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/* Bit numbers in busy */
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#define XMIT_BUSY	0
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#define RECV_BUSY	1
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#define XMIT_WAKEUP	2
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#define XMIT_FULL	3
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/* Queue management */
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#define PPPSYNC_MAX_RQLEN	32	/* arbitrary */
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/****************************** TYPES ******************************/
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/**************************** PROTOTYPES ****************************/
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/* ----------------------- CONTROL CHANNEL ----------------------- */
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static inline ssize_t
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	irnet_ctrl_write(irnet_socket *,
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			 const char *,
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			 size_t);
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static inline ssize_t
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	irnet_ctrl_read(irnet_socket *,
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			struct file *,
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			char *,
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			size_t);
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static inline unsigned int
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	irnet_ctrl_poll(irnet_socket *,
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			struct file *,
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			poll_table *);
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/* ----------------------- CHARACTER DEVICE ----------------------- */
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static int
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	dev_irnet_open(struct inode *,	/* fs callback : open */
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		       struct file *),
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	dev_irnet_close(struct inode *,
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			struct file *);
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static ssize_t
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	dev_irnet_write(struct file *,
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			const char __user *,
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			size_t,
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			loff_t *),
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	dev_irnet_read(struct file *,
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		       char __user *,
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		       size_t,
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		       loff_t *);
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static unsigned int
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	dev_irnet_poll(struct file *,
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		       poll_table *);
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static long
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	dev_irnet_ioctl(struct file *,
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			unsigned int,
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			unsigned long);
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/* ------------------------ PPP INTERFACE ------------------------ */
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static inline struct sk_buff *
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	irnet_prepare_skb(irnet_socket *,
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			  struct sk_buff *);
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static int
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	ppp_irnet_send(struct ppp_channel *,
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		      struct sk_buff *);
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static int
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	ppp_irnet_ioctl(struct ppp_channel *,
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			unsigned int,
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			unsigned long);
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/**************************** VARIABLES ****************************/
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/* Filesystem callbacks (to call us) */
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static const struct file_operations irnet_device_fops =
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{
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	.owner		= THIS_MODULE,
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	.read		= dev_irnet_read,
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	.write		= dev_irnet_write,
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	.poll		= dev_irnet_poll,
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	.unlocked_ioctl	= dev_irnet_ioctl,
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	.open		= dev_irnet_open,
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	.release	= dev_irnet_close,
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	.llseek		= noop_llseek,
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  /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
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};
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/* Structure so that the misc major (drivers/char/misc.c) take care of us... */
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static struct miscdevice irnet_misc_device =
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{
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	IRNET_MINOR,
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	"irnet",
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	&irnet_device_fops
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};
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#endif /* IRNET_PPP_H */
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