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1da177e4 LT |
1 | /* |
2 | * slip.h Define the SLIP device driver interface and constants. | |
3 | * | |
4 | * NOTE: THIS FILE WILL BE MOVED TO THE LINUX INCLUDE DIRECTORY | |
5 | * AS SOON AS POSSIBLE! | |
6 | * | |
7 | * Version: @(#)slip.h 1.2.0 03/28/93 | |
8 | * | |
9 | * Fixes: | |
10 | * Alan Cox : Added slip mtu field. | |
11 | * Matt Dillon : Printable slip (borrowed from net2e) | |
12 | * Alan Cox : Added SL_SLIP_LOTS | |
13 | * Dmitry Gorodchanin : A lot of changes in the 'struct slip' | |
14 | * Dmitry Gorodchanin : Added CSLIP statistics. | |
15 | * Stanislav Voronyi : Make line checking as created by | |
16 | * Igor Chechik, RELCOM Corp. | |
17 | * Craig Schlenter : Fixed #define bug that caused | |
18 | * CSLIP telnets to hang in 1.3.61-6 | |
19 | * | |
20 | * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> | |
21 | */ | |
22 | #ifndef _LINUX_SLIP_H | |
23 | #define _LINUX_SLIP_H | |
24 | ||
1da177e4 LT |
25 | |
26 | #if defined(CONFIG_INET) && defined(CONFIG_SLIP_COMPRESSED) | |
27 | # define SL_INCLUDE_CSLIP | |
28 | #endif | |
29 | ||
30 | #ifdef SL_INCLUDE_CSLIP | |
31 | # define SL_MODE_DEFAULT SL_MODE_ADAPTIVE | |
32 | #else | |
33 | # define SL_MODE_DEFAULT SL_MODE_SLIP | |
34 | #endif | |
35 | ||
36 | /* SLIP configuration. */ | |
37 | #define SL_NRUNIT 256 /* MAX number of SLIP channels; | |
38 | This can be overridden with | |
39 | insmod -oslip_maxdev=nnn */ | |
40 | #define SL_MTU 296 /* 296; I am used to 600- FvK */ | |
41 | ||
42 | /* SLIP protocol characters. */ | |
43 | #define END 0300 /* indicates end of frame */ | |
44 | #define ESC 0333 /* indicates byte stuffing */ | |
45 | #define ESC_END 0334 /* ESC ESC_END means END 'data' */ | |
46 | #define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */ | |
47 | ||
48 | ||
49 | struct slip { | |
50 | int magic; | |
51 | ||
52 | /* Various fields. */ | |
53 | struct tty_struct *tty; /* ptr to TTY structure */ | |
54 | struct net_device *dev; /* easy for intr handling */ | |
55 | spinlock_t lock; | |
56 | ||
57 | #ifdef SL_INCLUDE_CSLIP | |
58 | struct slcompress *slcomp; /* for header compression */ | |
59 | unsigned char *cbuff; /* compression buffer */ | |
60 | #endif | |
61 | ||
62 | /* These are pointers to the malloc()ed frame buffers. */ | |
63 | unsigned char *rbuff; /* receiver buffer */ | |
64 | int rcount; /* received chars counter */ | |
65 | unsigned char *xbuff; /* transmitter buffer */ | |
66 | unsigned char *xhead; /* pointer to next byte to XMIT */ | |
67 | int xleft; /* bytes left in XMIT queue */ | |
1da177e4 LT |
68 | int mtu; /* Our mtu (to spot changes!) */ |
69 | int buffsize; /* Max buffers sizes */ | |
70 | ||
71 | #ifdef CONFIG_SLIP_MODE_SLIP6 | |
72 | int xdata, xbits; /* 6 bit slip controls */ | |
73 | #endif | |
74 | ||
75 | unsigned long flags; /* Flag values/ mode etc */ | |
76 | #define SLF_INUSE 0 /* Channel in use */ | |
77 | #define SLF_ESCAPE 1 /* ESC received */ | |
78 | #define SLF_ERROR 2 /* Parity, etc. error */ | |
79 | #define SLF_KEEPTEST 3 /* Keepalive test flag */ | |
80 | #define SLF_OUTWAIT 4 /* is outpacket was flag */ | |
81 | ||
82 | unsigned char mode; /* SLIP mode */ | |
83 | unsigned char leased; | |
1da177e4 LT |
84 | pid_t pid; |
85 | #define SL_MODE_SLIP 0 | |
86 | #define SL_MODE_CSLIP 1 | |
87 | #define SL_MODE_SLIP6 2 /* Matt Dillon's printable slip */ | |
88 | #define SL_MODE_CSLIP6 (SL_MODE_SLIP6|SL_MODE_CSLIP) | |
89 | #define SL_MODE_AX25 4 | |
90 | #define SL_MODE_ADAPTIVE 8 | |
6aa20a22 | 91 | #ifdef CONFIG_SLIP_SMART |
1da177e4 LT |
92 | unsigned char outfill; /* # of sec between outfill packet */ |
93 | unsigned char keepalive; /* keepalive seconds */ | |
94 | struct timer_list outfill_timer; | |
95 | struct timer_list keepalive_timer; | |
6aa20a22 | 96 | #endif |
1da177e4 LT |
97 | }; |
98 | ||
99 | #define SLIP_MAGIC 0x5302 | |
100 | ||
101 | #endif /* _LINUX_SLIP.H */ |