arp.h

Coldfire MCF5282 DBug bootloader

/*
 * File:		arp.h
 * Purpose:		ARP definitions.
 *
 * Notes:
 *
 * Author:		Eric DeVolder
 * Date:		3-26-96
 *
 * Modifications:
 *
 */

#ifndef _ARP_H
#define _ARP_H

/********************************************************************/

/*
 * This data definition is defined for Ethernet only!
 */
typedef struct
{
	uint16		ar_hrd;
	uint16		ar_pro;
	uint8		ar_hln;
	uint8		ar_pln;
	uint16		opcode;
	uint8		ar_sha[6];	/* ethernet hw address */
	uint8		ar_spa[4];	/* ip address */
	uint8		ar_tha[6];	/* ethernet hw address */
	uint8		ar_tpa[4];	/* ip address */
} arp_frame_hdr;

/*
 * ARP table entry definition.  Note that this table only designed
 * with Ethernet and IP in mind.
 */
#define MAX_HWA_SIZE	(6)	/* 6 is enough for Ethernet address */
#define MAX_PA_SIZE		(4)	/* 4 is enough for Protocol address */
typedef struct
{
	uint16	protocol;
	uint8	hwa_size;
	uint8	hwa[MAX_HWA_SIZE];
	uint8	pa_size;
	uint8	pa[MAX_PA_SIZE];
	int		longevity;
} ARPENTRY;
#define MAX_ARP_ENTRY	(10)

typedef struct
{
	unsigned int	tab_size;
	ARPENTRY		table[MAX_ARP_ENTRY];
} ARP_INFO;

#define ARP_ENTRY_EMPTY	(0)
#define ARP_ENTRY_PERM	(1)
#define ARP_ENTRY_TEMP	(2)


#define ETHERNET		(1)
#define	ARP_REQUEST		(1)
#define	ARP_REPLY		(2)

#define ARP_TIMEOUT		(1)		/* Timeout in seconds */

/* Protocol Header information */
#define ARP_HDR_OFFSET	ETH_HDR_SIZE

/********************************************************************/

uint8 *
arp_get_mypa (void);

uint8 *
arp_get_myha (void);

uint8 *
arp_get_broadcast (void);

void
arp_merge (ARP_INFO *, uint16, int, uint8 *, int, uint8 *, int);

void
arp_remove (ARP_INFO *, uint16, uint8 *, uint8 *);

void
arp_request (NIF *, uint8 *, NBUF **);

void
arp_handler (NIF *, NBUF *);

uint8 *
arp_resolve (NIF *, uint16, uint8 *, NBUF **);

void
arp_init (ARP_INFO *);

/********************************************************************/

#endif	/* _ARP_H */