/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_X25_ASY_H #define _LINUX_X25_ASY_H /* X.25 asy configuration. */ #define SL_NRUNIT 256 /* MAX number of X.25 channels; This can be overridden with insmod -ox25_asy_maxdev=nnn */ #define SL_MTU 256 /* X25 async protocol characters. */ #define X25_END 0x7E /* indicates end of frame */ #define X25_ESC 0x7D /* indicates byte stuffing */ #define X25_ESCAPE(x) ((x)^0x20) #define X25_UNESCAPE(x) ((x)^0x20) struct x25_asy { int magic; /* Various fields. */ spinlock_t lock; struct tty_struct *tty; /* ptr to TTY structure */ struct net_device *dev; /* easy for intr handling */ /* These are pointers to the malloc()ed frame buffers. */ unsigned char *rbuff; /* receiver buffer */ int rcount; /* received chars counter */ unsigned char *xbuff; /* transmitter buffer */ unsigned char *xhead; /* pointer to next byte to XMIT */ int xleft; /* bytes left in XMIT queue */ int buffsize; /* Max buffers sizes */ unsigned long flags; /* Flag values/ mode etc */ #define SLF_INUSE 0 /* Channel in use */ #define SLF_ESCAPE 1 /* ESC received */ #define SLF_ERROR 2 /* Parity, etc. error */ }; #define X25_ASY_MAGIC 0x5303 int x25_asy_init(struct net_device *dev); #endif /* _LINUX_X25_ASY.H */