| /* | |
| * 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. */ | |
| unsigned long rx_packets; /* inbound frames counter */ | |
| unsigned long tx_packets; /* outbound frames counter */ | |
| unsigned long rx_bytes; /* inbound byte counte */ | |
| unsigned long tx_bytes; /* outbound byte counter */ | |
| unsigned long rx_errors; /* Parity, etc. errors */ | |
| unsigned long tx_errors; /* Planned stuff */ | |
| unsigned long rx_dropped; /* No memory for skb */ | |
| unsigned long tx_dropped; /* When MTU change */ | |
| unsigned long rx_over_errors; /* Frame bigger than SLIP buf. */ | |
| #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; | |
| dev_t line; | |
| 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 */ |