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/*!

 * \file    eth.h

 * \brief   Definitinos for Ethernet Frames

 * \version $Revision: 2 $

 * \author  Michael Norman

 */

#ifndef _ETH_H

#define _ETH_H

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

/* Ethernet standard lengths in bytes*/

#define ETH_ADDR_LEN    (6)

#define ETH_TYPE_LEN    (2)

#define ETH_CRC_LEN     (4)

#define ETH_MAX_DATA    (1500)

#define ETH_MIN_DATA    (46)

#define ETH_HDR_LEN     (ETH_ADDR_LEN * 2 + ETH_TYPE_LEN)

/* Defined Ethernet Frame Types */

#define ETH_FRM_IP      (0x0800)

#define ETH_FRM_ARP     (0x0806)

#define ETH_FRM_RARP    (0x8035)

#define ETH_FRM_TEST    (0xA5A5)

/* Maximum and Minimum Ethernet Frame Sizes */

#define ETH_MAX_FRM     (ETH_HDR_LEN + ETH_MAX_DATA + ETH_CRC_LEN)

#define ETH_MIN_FRM     (ETH_HDR_LEN + ETH_MIN_DATA + ETH_CRC_LEN)

#define ETH_MTU         (ETH_HDR_LEN + ETH_MAX_DATA)

/* Ethernet Addresses */

typedef unsigned char ETH_ADDR[ETH_ADDR_LEN];

/* 16-bit Ethernet Frame Type, ie. Protocol */

typedef unsigned short ETH_FRM_TYPE;

/* Ethernet Frame Header definition */

typedef struct

{

    ETH_ADDR     dest;

    ETH_ADDR     src;

    ETH_FRM_TYPE type;

} ETH_HDR;

/* Ethernet Frame definition */

typedef struct

{

    ETH_HDR head;

    unsigned char*  data;

} ETH_FRAME;

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

#endif  /* _ETH_H */