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