/* Copyright (C) 1997-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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/* Based on the FreeBSD version of this file. Curiously, that file

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lacks a copyright in the header. */

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#ifndef __NET_ETHERNET_H

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#define __NET_ETHERNET_H 1

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#include <sys/types.h>

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#include <stdint.h>

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#include <linux/if_ether.h> /* IEEE 802.3 Ethernet constants */

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__BEGIN_DECLS

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/* This is a name for the 48 bit ethernet address available on many

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systems. */

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struct ether_addr

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{

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uint8_t ether_addr_octet[ETH_ALEN];

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} __attribute__ ((__packed__));

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/* 10Mb/s ethernet header */

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struct ether_header

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{

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uint8_t ether_dhost[ETH_ALEN]; /* destination eth addr */

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uint8_t ether_shost[ETH_ALEN]; /* source ether addr */

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uint16_t ether_type; /* packet type ID field */

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} __attribute__ ((__packed__));

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/* Ethernet protocol ID's */

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#define ETHERTYPE_PUP 0x0200 /* Xerox PUP */

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#define ETHERTYPE_SPRITE 0x0500 /* Sprite */

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#define ETHERTYPE_IP 0x0800 /* IP */

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#define ETHERTYPE_ARP 0x0806 /* Address resolution */

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#define ETHERTYPE_REVARP 0x8035 /* Reverse ARP */

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#define ETHERTYPE_AT 0x809B /* AppleTalk protocol */

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#define ETHERTYPE_AARP 0x80F3 /* AppleTalk ARP */

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#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */

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#define ETHERTYPE_IPX 0x8137 /* IPX */

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#define ETHERTYPE_IPV6 0x86dd /* IP protocol version 6 */

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#define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */

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#define ETHER_ADDR_LEN ETH_ALEN /* size of ethernet addr */

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#define ETHER_TYPE_LEN 2 /* bytes in type field */

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#define ETHER_CRC_LEN 4 /* bytes in CRC field */

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#define ETHER_HDR_LEN ETH_HLEN /* total octets in header */

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#define ETHER_MIN_LEN (ETH_ZLEN + ETHER_CRC_LEN) /* min packet length */

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#define ETHER_MAX_LEN (ETH_FRAME_LEN + ETHER_CRC_LEN) /* max packet length */

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/* make sure ethenet length is valid */

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#define ETHER_IS_VALID_LEN(foo) \

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((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)

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/*

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* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have

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* (type-ETHERTYPE_TRAIL)*512 bytes of data followed

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* by an ETHER type (as given above) and then the (variable-length) header.

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*/

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#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */

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#define ETHERTYPE_NTRAILER 16

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#define ETHERMTU ETH_DATA_LEN

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#define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)

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__END_DECLS

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#endif /* net/ethernet.h */

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