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 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 int x25_asy_init(struct net_device *dev); 45 46 #endif /* _LINUX_X25_ASY.H */ 47