mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
a9481a38b1
Signed-off-by: Matvejchikov Ilya <matvejchikov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
|
|
* slip.h Define the SLIP device driver interface and constants.
|
|
*
|
|
* NOTE: THIS FILE WILL BE MOVED TO THE LINUX INCLUDE DIRECTORY
|
|
* AS SOON AS POSSIBLE!
|
|
*
|
|
* Version: @(#)slip.h 1.2.0 03/28/93
|
|
*
|
|
* Fixes:
|
|
* Alan Cox : Added slip mtu field.
|
|
* Matt Dillon : Printable slip (borrowed from net2e)
|
|
* Alan Cox : Added SL_SLIP_LOTS
|
|
* Dmitry Gorodchanin : A lot of changes in the 'struct slip'
|
|
* Dmitry Gorodchanin : Added CSLIP statistics.
|
|
* Stanislav Voronyi : Make line checking as created by
|
|
* Igor Chechik, RELCOM Corp.
|
|
* Craig Schlenter : Fixed #define bug that caused
|
|
* CSLIP telnets to hang in 1.3.61-6
|
|
*
|
|
* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
|
|
*/
|
|
#ifndef _LINUX_SLIP_H
|
|
#define _LINUX_SLIP_H
|
|
|
|
|
|
#if defined(CONFIG_INET) && defined(CONFIG_SLIP_COMPRESSED)
|
|
# define SL_INCLUDE_CSLIP
|
|
#endif
|
|
|
|
#ifdef SL_INCLUDE_CSLIP
|
|
# define SL_MODE_DEFAULT SL_MODE_ADAPTIVE
|
|
#else
|
|
# define SL_MODE_DEFAULT SL_MODE_SLIP
|
|
#endif
|
|
|
|
/* SLIP configuration. */
|
|
#define SL_NRUNIT 256 /* MAX number of SLIP channels;
|
|
This can be overridden with
|
|
insmod -oslip_maxdev=nnn */
|
|
#define SL_MTU 296 /* 296; I am used to 600- FvK */
|
|
|
|
/* SLIP protocol characters. */
|
|
#define END 0300 /* indicates end of frame */
|
|
#define ESC 0333 /* indicates byte stuffing */
|
|
#define ESC_END 0334 /* ESC ESC_END means END 'data' */
|
|
#define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
|
|
|
|
|
|
struct slip {
|
|
int magic;
|
|
|
|
/* Various fields. */
|
|
struct tty_struct *tty; /* ptr to TTY structure */
|
|
struct net_device *dev; /* easy for intr handling */
|
|
spinlock_t lock;
|
|
|
|
#ifdef SL_INCLUDE_CSLIP
|
|
struct slcompress *slcomp; /* for header compression */
|
|
unsigned char *cbuff; /* compression buffer */
|
|
#endif
|
|
|
|
/* These are pointers to the malloc()ed frame buffers. */
|
|
unsigned char *rbuff; /* receiver buffer */
|
|
int rcount; /* received chars counter */
|
|
unsigned char *xbuff; /* transmitter buffer */
|
|
unsigned char *xhead; /* pointer to next byte to XMIT */
|
|
int xleft; /* bytes left in XMIT queue */
|
|
|
|
/* SLIP interface statistics. */
|
|
#ifdef SL_INCLUDE_CSLIP
|
|
unsigned long tx_compressed;
|
|
unsigned long rx_compressed;
|
|
unsigned long tx_misses;
|
|
#endif
|
|
/* Detailed SLIP statistics. */
|
|
|
|
int mtu; /* Our mtu (to spot changes!) */
|
|
int buffsize; /* Max buffers sizes */
|
|
|
|
#ifdef CONFIG_SLIP_MODE_SLIP6
|
|
int xdata, xbits; /* 6 bit slip controls */
|
|
#endif
|
|
|
|
unsigned long flags; /* Flag values/ mode etc */
|
|
#define SLF_INUSE 0 /* Channel in use */
|
|
#define SLF_ESCAPE 1 /* ESC received */
|
|
#define SLF_ERROR 2 /* Parity, etc. error */
|
|
#define SLF_KEEPTEST 3 /* Keepalive test flag */
|
|
#define SLF_OUTWAIT 4 /* is outpacket was flag */
|
|
|
|
unsigned char mode; /* SLIP mode */
|
|
unsigned char leased;
|
|
pid_t pid;
|
|
#define SL_MODE_SLIP 0
|
|
#define SL_MODE_CSLIP 1
|
|
#define SL_MODE_SLIP6 2 /* Matt Dillon's printable slip */
|
|
#define SL_MODE_CSLIP6 (SL_MODE_SLIP6|SL_MODE_CSLIP)
|
|
#define SL_MODE_AX25 4
|
|
#define SL_MODE_ADAPTIVE 8
|
|
#ifdef CONFIG_SLIP_SMART
|
|
unsigned char outfill; /* # of sec between outfill packet */
|
|
unsigned char keepalive; /* keepalive seconds */
|
|
struct timer_list outfill_timer;
|
|
struct timer_list keepalive_timer;
|
|
#endif
|
|
};
|
|
|
|
#define SLIP_MAGIC 0x5302
|
|
|
|
#endif /* _LINUX_SLIP.H */
|