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drivers
net
wan
x25_asy.h
Go to the documentation of this file.
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#ifndef _LINUX_X25_ASY_H
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#define _LINUX_X25_ASY_H
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/* X.25 asy configuration. */
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#define SL_NRUNIT 256
/* MAX number of X.25 channels;
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This can be overridden with
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insmod -ox25_asy_maxdev=nnn */
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#define SL_MTU 256
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/* X25 async protocol characters. */
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#define X25_END 0x7E
/* indicates end of frame */
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#define X25_ESC 0x7D
/* indicates byte stuffing */
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#define X25_ESCAPE(x) ((x)^0x20)
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#define X25_UNESCAPE(x) ((x)^0x20)
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struct
x25_asy
{
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int
magic
;
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/* Various fields. */
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spinlock_t
lock
;
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struct
tty_struct
*
tty
;
/* ptr to TTY structure */
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struct
net_device
*
dev
;
/* easy for intr handling */
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/* These are pointers to the malloc()ed frame buffers. */
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unsigned
char
*
rbuff
;
/* receiver buffer */
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int
rcount
;
/* received chars counter */
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unsigned
char
*
xbuff
;
/* transmitter buffer */
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unsigned
char
*
xhead
;
/* pointer to next byte to XMIT */
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int
xleft
;
/* bytes left in XMIT queue */
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int
buffsize
;
/* Max buffers sizes */
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unsigned
long
flags
;
/* Flag values/ mode etc */
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#define SLF_INUSE 0
/* Channel in use */
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#define SLF_ESCAPE 1
/* ESC received */
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#define SLF_ERROR 2
/* Parity, etc. error */
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#define SLF_OUTWAIT 4
/* Waiting for output */
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};
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#define X25_ASY_MAGIC 0x5303
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extern
int
x25_asy_init
(
struct
net_device
*
dev
);
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#endif
/* _LINUX_X25_ASY.H */
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