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 17struct 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 48extern int x25_asy_init(struct net_device *dev); 49 50#endif /* _LINUX_X25_ASY.H */ 51