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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#ifndef _ETHERNET_H
#define _ETHERNET_H
#include <stdint.h>
#define ETH_MTU_SIZE 1518 /**< Maximum Transfer Unit */
#define ETH_ALEN 6 /**< HW address length */
#define ETHERTYPE_IP 0x0800
#define ETHERTYPE_IPv6 0x86DD
#define ETHERTYPE_ARP 0x0806
/** \struct ethhdr
* A header for Ethernet-packets.
*/
struct ethhdr {
uint8_t dest_mac[ETH_ALEN]; /**< Destination HW address */
uint8_t src_mac[ETH_ALEN]; /**< Source HW address */
uint16_t type; /**< Next level protocol type */
};
/* Initializes ethernet layer */
extern void set_mac_address(const uint8_t * own_mac);
extern const uint8_t * get_mac_address(void);
/* Receives and handles packets, according to Receive-handle diagram */
extern int32_t receive_ether(int fd);
/* Sends an ethernet frame. */
extern int send_ether(int fd, void* buffer, int len);
/* fills ethernet header */
extern void fill_ethhdr(uint8_t * packet, uint16_t eth_type,
const uint8_t * src_mac, const uint8_t * dest_mac);
/* Points either to send_ipv4() or send_ipv6() */
extern int (*send_ip)(int fd, void *, int);
#endif
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