V9/sys/h.old/ethernet.h

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#ifndef _ETHERNET_
#define _ETHERNET_

struct etherpup {
     u_char    dhost[6];
     u_char    shost[6];
     u_short   type;
};

#define ETHERPUP_IPTYPE	      0x800
#define ETHERPUP_CHAOSTYPE    0x804
#define ETHERPUP_ARPTYPE      0x806

#endif

#ifndef CHANS_PER_UNIT
#define CHANS_PER_UNIT	8
#endif