/* Copyright (C) 1997 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library 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   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#ifndef _NET_IF_ETHER_H#define _NET_IF_ETHER_H	1/* *	IEEE 802.3 Ethernet magic constants.  The frame sizes omit the preamble *	and FCS/CRC (frame check sequence). */#define ETH_ALEN	6		/* Octets in one ethernet addr	 */#define ETH_HLEN	14		/* Total octets in header.	 */#define ETH_ZLEN	60		/* Min. octets in frame sans FCS */#define ETH_DATA_LEN	1500		/* Max. octets in payload	 */#define ETH_FRAME_LEN	1514		/* Max. octets in frame sans FCS *//* *	These are the defined Ethernet Protocol ID's. */#define ETH_P_LOOP	0x0060		/* Ethernet Loopback packet	*/#define ETH_P_ECHO	0x0200		/* Ethernet Echo packet		*/#define ETH_P_PUP	0x0400		/* Xerox PUP packet		*/#define ETH_P_IP	0x0800		/* Internet Protocol packet	*/#define ETH_P_X25	0x0805		/* CCITT X.25			*/#define ETH_P_ARP	0x0806		/* Address Resolution packet	*/#define	ETH_P_BPQ	0x08FF		/* G8BPQ AX.25 Ethernet Packet	[ NOT AN OFFICIALLY REGISTERED ID ] */#define ETH_P_DEC       0x6000          /* DEC Assigned proto           */#define ETH_P_DNA_DL    0x6001          /* DEC DNA Dump/Load            */#define ETH_P_DNA_RC    0x6002          /* DEC DNA Remote Console       */#define ETH_P_DNA_RT    0x6003          /* DEC DNA Routing              */#define ETH_P_LAT       0x6004          /* DEC LAT                      */#define ETH_P_DIAG      0x6005          /* DEC Diagnostics              */#define ETH_P_CUST      0x6006          /* DEC Customer use             */#define ETH_P_SCA       0x6007          /* DEC Systems Comms Arch       */#define ETH_P_RARP      0x8035		/* Reverse Addr Res packet	*/#define ETH_P_ATALK	0x809B		/* Appletalk DDP		*/#define ETH_P_AARP	0x80F3		/* Appletalk AARP		*/#define ETH_P_IPX	0x8137		/* IPX over DIX			*/#define ETH_P_IPV6	0x86DD		/* IPv6 over bluebook		*//* *	Non DIX types. Won't clash for 1500 types. */#define ETH_P_802_3	0x0001		/* Dummy type for 802.3 frames  */#define ETH_P_AX25	0x0002		/* Dummy protocol id for AX.25  */#define ETH_P_ALL	0x0003		/* Every packet (be careful!!!) */#define ETH_P_802_2	0x0004		/* 802.2 frames 		*/#define ETH_P_SNAP	0x0005		/* Internal only		*/#define ETH_P_DDCMP     0x0006          /* DEC DDCMP: Internal only     */#define ETH_P_WAN_PPP   0x0007          /* Dummy type for WAN PPP frames*/#define ETH_P_PPP_MP    0x0008          /* Dummy type for PPP MP frames */#define ETH_P_LOCALTALK 0x0009		/* Localtalk pseudo type 	*/#define ETH_P_PPPTALK	0x0010		/* Dummy type for Atalk over PPP*/#define ETH_P_TR_802_2	0x0011		/* 802.2 frames 		*//* *	This is an Ethernet frame header. */struct ethhdr{  unsigned char	h_dest[ETH_ALEN];	/* destination eth addr	*/  unsigned char	h_source[ETH_ALEN];	/* source ether addr	*/  unsigned short int h_proto;		/* packet type ID field	*/};#endif	/* net/if_ether.h */