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- /* 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 SLF_OUTWAIT 4 /* Waiting for output */
- };
- #define X25_ASY_MAGIC 0x5303
- int x25_asy_init(struct net_device *dev);
- #endif /* _LINUX_X25_ASY.H */
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