1 /* Copyright (C) 1997-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _NET_IF_ETHER_H 19 #define _NET_IF_ETHER_H 1 20 21 /* 22 * IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble 23 * and FCS/CRC (frame check sequence). 24 */ 25 26 #define ETH_ALEN 6 /* Octets in one ethernet addr */ 27 #define ETH_HLEN 14 /* Total octets in header. */ 28 #define ETH_ZLEN 60 /* Min. octets in frame sans FCS */ 29 #define ETH_DATA_LEN 1500 /* Max. octets in payload */ 30 #define ETH_FRAME_LEN 1514 /* Max. octets in frame sans FCS */ 31 32 /* 33 * These are the defined Ethernet Protocol ID's. 34 */ 35 36 #define ETH_P_LOOP 0x0060 /* Ethernet Loopback packet */ 37 #define ETH_P_ECHO 0x0200 /* Ethernet Echo packet */ 38 #define ETH_P_PUP 0x0400 /* Xerox PUP packet */ 39 #define ETH_P_IP 0x0800 /* Internet Protocol packet */ 40 #define ETH_P_X25 0x0805 /* CCITT X.25 */ 41 #define ETH_P_ARP 0x0806 /* Address Resolution packet */ 42 #define ETH_P_BPQ 0x08FF /* G8BPQ AX.25 Ethernet Packet [ NOT AN OFFICIALLY REGISTERED ID ] */ 43 #define ETH_P_DEC 0x6000 /* DEC Assigned proto */ 44 #define ETH_P_DNA_DL 0x6001 /* DEC DNA Dump/Load */ 45 #define ETH_P_DNA_RC 0x6002 /* DEC DNA Remote Console */ 46 #define ETH_P_DNA_RT 0x6003 /* DEC DNA Routing */ 47 #define ETH_P_LAT 0x6004 /* DEC LAT */ 48 #define ETH_P_DIAG 0x6005 /* DEC Diagnostics */ 49 #define ETH_P_CUST 0x6006 /* DEC Customer use */ 50 #define ETH_P_SCA 0x6007 /* DEC Systems Comms Arch */ 51 #define ETH_P_RARP 0x8035 /* Reverse Addr Res packet */ 52 #define ETH_P_ATALK 0x809B /* Appletalk DDP */ 53 #define ETH_P_AARP 0x80F3 /* Appletalk AARP */ 54 #define ETH_P_IPX 0x8137 /* IPX over DIX */ 55 #define ETH_P_IPV6 0x86DD /* IPv6 over bluebook */ 56 57 /* 58 * Non DIX types. Won't clash for 1500 types. 59 */ 60 61 #define ETH_P_802_3 0x0001 /* Dummy type for 802.3 frames */ 62 #define ETH_P_AX25 0x0002 /* Dummy protocol id for AX.25 */ 63 #define ETH_P_ALL 0x0003 /* Every packet (be careful!!!) */ 64 #define ETH_P_802_2 0x0004 /* 802.2 frames */ 65 #define ETH_P_SNAP 0x0005 /* Internal only */ 66 #define ETH_P_DDCMP 0x0006 /* DEC DDCMP: Internal only */ 67 #define ETH_P_WAN_PPP 0x0007 /* Dummy type for WAN PPP frames*/ 68 #define ETH_P_PPP_MP 0x0008 /* Dummy type for PPP MP frames */ 69 #define ETH_P_LOCALTALK 0x0009 /* Localtalk pseudo type */ 70 #define ETH_P_PPPTALK 0x0010 /* Dummy type for Atalk over PPP*/ 71 #define ETH_P_TR_802_2 0x0011 /* 802.2 frames */ 72 73 /* 74 * This is an Ethernet frame header. 75 */ 76 77 struct ethhdr 78 { 79 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ 80 unsigned char h_source[ETH_ALEN]; /* source ether addr */ 81 unsigned short int h_proto; /* packet type ID field */ 82 }; 83 84 #endif /* net/if_ether.h */ 85