| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
| 31 | |
| 32 | /* X.25 interface statistics. */ |
| 33 | struct net_device_stats stats; |
| 34 | |
| 35 | int buffsize; /* Max buffers sizes */ |
| 36 | |
| 37 | unsigned long flags; /* Flag values/ mode etc */ |
| 38 | #define SLF_INUSE 0 /* Channel in use */ |
| 39 | #define SLF_ESCAPE 1 /* ESC received */ |
| 40 | #define SLF_ERROR 2 /* Parity, etc. error */ |
| 41 | #define SLF_OUTWAIT 4 /* Waiting for output */ |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | |
| 46 | #define X25_ASY_MAGIC 0x5303 |
| 47 | |
| 48 | extern int x25_asy_init(struct net_device *dev); |
| 49 | |
| 50 | #endif /* _LINUX_X25_ASY.H */ |