| /* |
| * 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 |
| |
| #include <linux/config.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 then 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 */ |
