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path: root/drivers/net/wan/x25_asy.h
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Diffstat (limited to 'drivers/net/wan/x25_asy.h')
-rw-r--r--drivers/net/wan/x25_asy.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/net/wan/x25_asy.h b/drivers/net/wan/x25_asy.h
new file mode 100644
index 000000000000..41770200ceb6
--- /dev/null
+++ b/drivers/net/wan/x25_asy.h
@@ -0,0 +1,50 @@
+#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 */
+
+ /* X.25 interface statistics. */
+ struct net_device_stats stats;
+
+ 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
+
+extern int x25_asy_init(struct net_device *dev);
+
+#endif /* _LINUX_X25_ASY.H */