MODULE ARPDEF IDENT "ARPDEF-1-X";


CONSTANT	(
	request,
	reply
	) EQUALS 1 INCREMENT 1 PREFIX arp$;

AGGREGATE	pdu	STRUCTURE PREFIX arp$ TAG arp$;

	dst	BYTE UNSIGNED DIMENSION 6;/* Ethernet address of destination
	src	BYTE UNSIGNED DIMENSION 6;/* Ethernet address of sender
	type	WORD UNSIGNED;		/* Protocol type = ether_type$ADDRESS_RESOLUTION

	hrd	WORD UNSIGNED;		/* Hardware address space (e.g., Ethernet,
					/* Packet Radio Net.)
	proto	WORD UNSIGNED;		/* Protocol address space.  For Ethernet
					/* hardware, this is from the set of type
					/* fields ether_typ$<protocol>.
	hln	BYTE UNSIGNED;		/* byte length of each hardware address
	pln	BYTE UNSIGNED;		/* byte length of each protocol address

	op	WORD UNSIGNED;		/* opcode (ares_op$REQUEST | ares_op$REPLY)

	sha	BYTE UNSIGNED DIMENSION 6;
	spa	WORD UNSIGNED;
	tha	BYTE UNSIGNED DIMENSION 6;
	tpa	WORD UNSIGNED;

END	pdu;

END_MODULE ARPDEF;