1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Global definitions for the Ethernet IEEE 802.3 interface.
8 *
9 * Version: @(#)if_ether.h 1.0.1a 02/08/94
10 *
11 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Donald Becker, <becker@super.org>
13 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
14 * Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
20 */
21
22#ifndef _LINUX_IF_ETHER_H
23#define _LINUX_IF_ETHER_H
24
25#include <linux/types.h>
26
27/*
28 * IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble
29 * and FCS/CRC (frame check sequence).
30 */
31
32#define ETH_ALEN 6 /* Octets in one ethernet addr */
33#define ETH_TLEN 2 /* Octets in ethernet type field */
34#define ETH_HLEN 14 /* Total octets in header. */
35#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
36#define ETH_DATA_LEN 1500 /* Max. octets in payload */
37#define ETH_FRAME_LEN 1514 /* Max. octets in frame sans FCS */
38#define ETH_FCS_LEN 4 /* Octets in the FCS */
39
40#define ETH_MIN_MTU 68 /* Min IPv4 MTU per RFC791 */
41#define ETH_MAX_MTU 0xFFFFU /* 65535, same as IP_MAX_MTU */
42
43/*
44 * These are the defined Ethernet Protocol ID's.
45 */
46
47#define ETH_P_LOOP 0x0060 /* Ethernet Loopback packet */
48#define ETH_P_PUP 0x0200 /* Xerox PUP packet */
49#define ETH_P_PUPAT 0x0201 /* Xerox PUP Addr Trans packet */
50#define ETH_P_TSN 0x22F0 /* TSN (IEEE 1722) packet */
51#define ETH_P_ERSPAN2 0x22EB /* ERSPAN version 2 (type III) */
52#define ETH_P_IP 0x0800 /* Internet Protocol packet */
53#define ETH_P_X25 0x0805 /* CCITT X.25 */
54#define ETH_P_ARP 0x0806 /* Address Resolution packet */
55#define ETH_P_BPQ 0x08FF /* G8BPQ AX.25 Ethernet Packet [ NOT AN OFFICIALLY REGISTERED ID ] */
56#define ETH_P_IEEEPUP 0x0a00 /* Xerox IEEE802.3 PUP packet */
57#define ETH_P_IEEEPUPAT 0x0a01 /* Xerox IEEE802.3 PUP Addr Trans packet */
58#define ETH_P_BATMAN 0x4305 /* B.A.T.M.A.N.-Advanced packet [ NOT AN OFFICIALLY REGISTERED ID ] */
59#define ETH_P_DEC 0x6000 /* DEC Assigned proto */
60#define ETH_P_DNA_DL 0x6001 /* DEC DNA Dump/Load */
61#define ETH_P_DNA_RC 0x6002 /* DEC DNA Remote Console */
62#define ETH_P_DNA_RT 0x6003 /* DEC DNA Routing */
63#define ETH_P_LAT 0x6004 /* DEC LAT */
64#define ETH_P_DIAG 0x6005 /* DEC Diagnostics */
65#define ETH_P_CUST 0x6006 /* DEC Customer use */
66#define ETH_P_SCA 0x6007 /* DEC Systems Comms Arch */
67#define ETH_P_TEB 0x6558 /* Trans Ether Bridging */
68#define ETH_P_RARP 0x8035 /* Reverse Addr Res packet */
69#define ETH_P_ATALK 0x809B /* Appletalk DDP */
70#define ETH_P_AARP 0x80F3 /* Appletalk AARP */
71#define ETH_P_8021Q 0x8100 /* 802.1Q VLAN Extended Header */
72#define ETH_P_ERSPAN 0x88BE /* ERSPAN type II */
73#define ETH_P_IPX 0x8137 /* IPX over DIX */
74#define ETH_P_IPV6 0x86DD /* IPv6 over bluebook */
75#define ETH_P_PAUSE 0x8808 /* IEEE Pause frames. See 802.3 31B */
76#define ETH_P_SLOW 0x8809 /* Slow Protocol. See 802.3ad 43B */
77#define ETH_P_WCCP 0x883E /* Web-cache coordination protocol
78 * defined in draft-wilson-wrec-wccp-v2-00.txt */
79#define ETH_P_MPLS_UC 0x8847 /* MPLS Unicast traffic */
80#define ETH_P_MPLS_MC 0x8848 /* MPLS Multicast traffic */
81#define ETH_P_ATMMPOA 0x884c /* MultiProtocol Over ATM */
82#define ETH_P_PPP_DISC 0x8863 /* PPPoE discovery messages */
83#define ETH_P_PPP_SES 0x8864 /* PPPoE session messages */
84#define ETH_P_LINK_CTL 0x886c /* HPNA, wlan link local tunnel */
85#define ETH_P_ATMFATE 0x8884 /* Frame-based ATM Transport
86 * over Ethernet
87 */
88#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
89#define ETH_P_AOE 0x88A2 /* ATA over Ethernet */
90#define ETH_P_8021AD 0x88A8 /* 802.1ad Service VLAN */
91#define ETH_P_802_EX1 0x88B5 /* 802.1 Local Experimental 1. */
92#define ETH_P_PREAUTH 0x88C7 /* 802.11 Preauthentication */
93#define ETH_P_TIPC 0x88CA /* TIPC */
94#define ETH_P_LLDP 0x88CC /* Link Layer Discovery Protocol */
95#define ETH_P_MACSEC 0x88E5 /* 802.1ae MACsec */
96#define ETH_P_8021AH 0x88E7 /* 802.1ah Backbone Service Tag */
97#define ETH_P_MVRP 0x88F5 /* 802.1Q MVRP */
98#define ETH_P_1588 0x88F7 /* IEEE 1588 Timesync */
99#define ETH_P_NCSI 0x88F8 /* NCSI protocol */
100#define ETH_P_PRP 0x88FB /* IEC 62439-3 PRP/HSRv0 */
101#define ETH_P_FCOE 0x8906 /* Fibre Channel over Ethernet */
102#define ETH_P_IBOE 0x8915 /* Infiniband over Ethernet */
103#define ETH_P_TDLS 0x890D /* TDLS */
104#define ETH_P_FIP 0x8914 /* FCoE Initialization Protocol */
105#define ETH_P_80221 0x8917 /* IEEE 802.21 Media Independent Handover Protocol */
106#define ETH_P_HSR 0x892F /* IEC 62439-3 HSRv1 */
107#define ETH_P_NSH 0x894F /* Network Service Header */
108#define ETH_P_LOOPBACK 0x9000 /* Ethernet loopback packet, per IEEE 802.3 */
109#define ETH_P_QINQ1 0x9100 /* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
110#define ETH_P_QINQ2 0x9200 /* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
111#define ETH_P_QINQ3 0x9300 /* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
112#define ETH_P_EDSA 0xDADA /* Ethertype DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
113#define ETH_P_DSA_8021Q 0xDADB /* Fake VLAN Header for DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
114#define ETH_P_IFE 0xED3E /* ForCES inter-FE LFB type */
115#define ETH_P_AF_IUCV 0xFBFB /* IBM af_iucv [ NOT AN OFFICIALLY REGISTERED ID ] */
116
117#define ETH_P_802_3_MIN 0x0600 /* If the value in the ethernet type is less than this value
118 * then the frame is Ethernet II. Else it is 802.3 */
119
120/*
121 * Non DIX types. Won't clash for 1500 types.
122 */
123
124#define ETH_P_802_3 0x0001 /* Dummy type for 802.3 frames */
125#define ETH_P_AX25 0x0002 /* Dummy protocol id for AX.25 */
126#define ETH_P_ALL 0x0003 /* Every packet (be careful!!!) */
127#define ETH_P_802_2 0x0004 /* 802.2 frames */
128#define ETH_P_SNAP 0x0005 /* Internal only */
129#define ETH_P_DDCMP 0x0006 /* DEC DDCMP: Internal only */
130#define ETH_P_WAN_PPP 0x0007 /* Dummy type for WAN PPP frames*/
131#define ETH_P_PPP_MP 0x0008 /* Dummy type for PPP MP frames */
132#define ETH_P_LOCALTALK 0x0009 /* Localtalk pseudo type */
133#define ETH_P_CAN 0x000C /* CAN: Controller Area Network */
134#define ETH_P_CANFD 0x000D /* CANFD: CAN flexible data rate*/
135#define ETH_P_PPPTALK 0x0010 /* Dummy type for Atalk over PPP*/
136#define ETH_P_TR_802_2 0x0011 /* 802.2 frames */
137#define ETH_P_MOBITEX 0x0015 /* Mobitex (kaz@cafe.net) */
138#define ETH_P_CONTROL 0x0016 /* Card specific control frames */
139#define ETH_P_IRDA 0x0017 /* Linux-IrDA */
140#define ETH_P_ECONET 0x0018 /* Acorn Econet */
141#define ETH_P_HDLC 0x0019 /* HDLC frames */
142#define ETH_P_ARCNET 0x001A /* 1A for ArcNet :-) */
143#define ETH_P_DSA 0x001B /* Distributed Switch Arch. */
144#define ETH_P_TRAILER 0x001C /* Trailer switch tagging */
145#define ETH_P_PHONET 0x00F5 /* Nokia Phonet frames */
146#define ETH_P_IEEE802154 0x00F6 /* IEEE802.15.4 frame */
147#define ETH_P_CAIF 0x00F7 /* ST-Ericsson CAIF protocol */
148#define ETH_P_XDSA 0x00F8 /* Multiplexed DSA protocol */
149#define ETH_P_MAP 0x00F9 /* Qualcomm multiplexing and
150 * aggregation protocol
151 */
152
153/*
154 * This is an Ethernet frame header.
155 */
156
157/* allow libcs like musl to deactivate this, glibc does not implement this. */
158#ifndef __UAPI_DEF_ETHHDR
159#define __UAPI_DEF_ETHHDR 1
160#endif
161
162#if __UAPI_DEF_ETHHDR
163struct ethhdr {
164 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
165 unsigned char h_source[ETH_ALEN]; /* source ether addr */
166 __be16 h_proto; /* packet type ID field */
167} __attribute__((packed));
168#endif
169
170
171#endif /* _LINUX_IF_ETHER_H */
172