/* * snull.h -- definitions for the network module * *********//* version dependencies have been confined to a separate file */#include "sysdep.h"/* * Macros to help debugging */#undef PDEBUG             /* undef it, just in case */#ifdef SNULL_DEBUG#  ifdef __KERNEL__     /* This one if debugging is on, and kernel space */#    define PDEBUG(fmt, args...) printk( KERN_DEBUG "snull: " fmt, ## args)#  else     /* This one for user space */#    define PDEBUG(fmt, args...) fprintf(stderr, fmt, ## args)#  endif#else#  define PDEBUG(fmt, args...) /* not debugging: nothing */#endif#undef PDEBUGG#define PDEBUGG(fmt, args...) /* nothing: it's a placeholder *//* These are the flags in the statusword */#define SNULL_RX_INTR 0x0001#define SNULL_TX_INTR 0x0002/* Default timeout period */#define SNULL_TIMEOUT 5   /* In jiffies */extern struct net_device snull_devs[];