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/*
* Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de>
* See file CREDITS for list of people who contributed to this project.
*
* This file is part of barebox.
*
* barebox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* barebox is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with barebox. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file
* Declaration for for Ethernet Frames.
*/
#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 uint8_t ETH_ADDR[ETH_ADDR_LEN];
/* 16-bit Ethernet Frame Type, ie. Protocol */
typedef uint16_t 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;
uint8_t* data;
} ETH_FRAME;
#endif /* _ETH_H */
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