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1da177e4 LT |
1 | #ifndef _LINUX_X25_ASY_H |
2 | #define _LINUX_X25_ASY_H | |
3 | ||
4 | /* X.25 asy configuration. */ | |
5 | #define SL_NRUNIT 256 /* MAX number of X.25 channels; | |
6 | This can be overridden with | |
7 | insmod -ox25_asy_maxdev=nnn */ | |
8 | #define SL_MTU 256 | |
9 | ||
10 | /* X25 async protocol characters. */ | |
11 | #define X25_END 0x7E /* indicates end of frame */ | |
12 | #define X25_ESC 0x7D /* indicates byte stuffing */ | |
13 | #define X25_ESCAPE(x) ((x)^0x20) | |
14 | #define X25_UNESCAPE(x) ((x)^0x20) | |
15 | ||
16 | ||
17 | struct x25_asy { | |
18 | int magic; | |
19 | ||
20 | /* Various fields. */ | |
21 | spinlock_t lock; | |
22 | struct tty_struct *tty; /* ptr to TTY structure */ | |
23 | struct net_device *dev; /* easy for intr handling */ | |
24 | ||
25 | /* These are pointers to the malloc()ed frame buffers. */ | |
26 | unsigned char *rbuff; /* receiver buffer */ | |
27 | int rcount; /* received chars counter */ | |
28 | unsigned char *xbuff; /* transmitter buffer */ | |
29 | unsigned char *xhead; /* pointer to next byte to XMIT */ | |
30 | int xleft; /* bytes left in XMIT queue */ | |
1da177e4 LT |
31 | int buffsize; /* Max buffers sizes */ |
32 | ||
33 | unsigned long flags; /* Flag values/ mode etc */ | |
34 | #define SLF_INUSE 0 /* Channel in use */ | |
35 | #define SLF_ESCAPE 1 /* ESC received */ | |
36 | #define SLF_ERROR 2 /* Parity, etc. error */ | |
37 | #define SLF_OUTWAIT 4 /* Waiting for output */ | |
38 | }; | |
39 | ||
40 | ||
41 | ||
42 | #define X25_ASY_MAGIC 0x5303 | |
43 | ||
44 | extern int x25_asy_init(struct net_device *dev); | |
45 | ||
46 | #endif /* _LINUX_X25_ASY.H */ |