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46 lines
1.5 KiB
46 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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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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}; |
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#define X25_ASY_MAGIC 0x5303 |
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int x25_asy_init(struct net_device *dev); |
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#endif /* _LINUX_X25_ASY.H */
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