50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
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/*
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* snull.h -- definitions for the network module
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*
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* Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet
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* Copyright (C) 2001 O'Reilly & Associates
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*
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* The source code in this file can be freely used, adapted,
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* and redistributed in source or binary form, so long as an
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* acknowledgment appears in derived source files. The citation
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* should list that the code comes from the book "Linux Device
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* Drivers" by Alessandro Rubini and Jonathan Corbet, published
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* by O'Reilly & Associates. No warranty is attached;
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* we cannot take responsibility for errors or fitness for use.
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*/
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/*
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* Macros to help debugging
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*/
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#undef PDEBUG /* undef it, just in case */
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#ifdef SNULL_DEBUG
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# ifdef __KERNEL__
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/* This one if debugging is on, and kernel space */
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# define PDEBUG(fmt, args...) printk( KERN_DEBUG "snull: " fmt, ## args)
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# else
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/* This one for user space */
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# define PDEBUG(fmt, args...) fprintf(stderr, fmt, ## args)
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# endif
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#else
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# define PDEBUG(fmt, args...) /* not debugging: nothing */
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#endif
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#undef PDEBUGG
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#define PDEBUGG(fmt, args...) /* nothing: it's a placeholder */
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/* These are the flags in the statusword */
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#define SNULL_RX_INTR 0x0001
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#define SNULL_TX_INTR 0x0002
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/* Default timeout period */
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#define SNULL_TIMEOUT 5 /* In jiffies */
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extern struct net_device *snull_devs[];
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