github.com/cilium/cilium@v1.16.2/bpf/include/linux/if_ether.h (about)

     1  /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2  /* Copyright Authors of the Linux kernel */
     3  /*
     4   * INET		An implementation of the TCP/IP protocol suite for the LINUX
     5   *		operating system.  INET is implemented using the  BSD Socket
     6   *		interface as the means of communication with the user level.
     7   *
     8   *		Global definitions for the Ethernet IEEE 802.3 interface.
     9   *
    10   * Version:	@(#)if_ether.h	1.0.1a	02/08/94
    11   *
    12   * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    13   *		Donald Becker, <becker@super.org>
    14   *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
    15   *		Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
    16   *
    17   *		This program is free software; you can redistribute it and/or
    18   *		modify it under the terms of the GNU General Public License
    19   *		as published by the Free Software Foundation; either version
    20   *		2 of the License, or (at your option) any later version.
    21   */
    22  
    23  #pragma once
    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  /* __ETH_HLEN is out of sync with the kernel's if_ether.h. In Cilium datapath
    34   * we use ETH_HLEN which can be loaded via static data, and for L2-less devs
    35   * it's 0. To avoid replacing every occurrence of ETH_HLEN in the datapath,
    36   * we prefixed the kernel's ETH_HLEN instead.
    37   */
    38  #define __ETH_HLEN	14		/* Total octets in header.	 */
    39  #define ETH_ZLEN	60		/* Min. octets in frame sans FCS */
    40  #define ETH_DATA_LEN	1500		/* Max. octets in payload	 */
    41  #define ETH_FRAME_LEN	1514		/* Max. octets in frame sans FCS */
    42  #define ETH_FCS_LEN	4		/* Octets in the FCS		 */
    43  
    44  /*
    45   *	These are the defined Ethernet Protocol ID's.
    46   */
    47  
    48  #define ETH_P_LOOP	0x0060		/* Ethernet Loopback packet	*/
    49  #define ETH_P_PUP	0x0200		/* Xerox PUP packet		*/
    50  #define ETH_P_PUPAT	0x0201		/* Xerox PUP Addr Trans packet	*/
    51  #define ETH_P_TSN	0x22F0		/* TSN (IEEE 1722) packet	*/
    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_IPX	0x8137		/* IPX over DIX			*/
    73  #define ETH_P_IPV6	0x86DD		/* IPv6 over bluebook		*/
    74  #define ETH_P_PAUSE	0x8808		/* IEEE Pause frames. See 802.3 31B */
    75  #define ETH_P_SLOW	0x8809		/* Slow Protocol. See 802.3ad 43B */
    76  #define ETH_P_WCCP	0x883E		/* Web-cache coordination protocol
    77  					 * defined in draft-wilson-wrec-wccp-v2-00.txt */
    78  #define ETH_P_MPLS_UC	0x8847		/* MPLS Unicast traffic		*/
    79  #define ETH_P_MPLS_MC	0x8848		/* MPLS Multicast traffic	*/
    80  #define ETH_P_ATMMPOA	0x884c		/* MultiProtocol Over ATM	*/
    81  #define ETH_P_PPP_DISC	0x8863		/* PPPoE discovery messages     */
    82  #define ETH_P_PPP_SES	0x8864		/* PPPoE session messages	*/
    83  #define ETH_P_LINK_CTL	0x886c		/* HPNA, wlan link local tunnel */
    84  #define ETH_P_ATMFATE	0x8884		/* Frame-based ATM Transport
    85  					 * over Ethernet
    86  					 */
    87  #define ETH_P_PAE	0x888E		/* Port Access Entity (IEEE 802.1X) */
    88  #define ETH_P_AOE	0x88A2		/* ATA over Ethernet		*/
    89  #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
    90  #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
    91  #define ETH_P_TIPC	0x88CA		/* TIPC 			*/
    92  #define ETH_P_8021AH	0x88E7          /* 802.1ah Backbone Service Tag */
    93  #define ETH_P_MVRP	0x88F5          /* 802.1Q MVRP                  */
    94  #define ETH_P_1588	0x88F7		/* IEEE 1588 Timesync */
    95  #define ETH_P_PRP	0x88FB		/* IEC 62439-3 PRP/HSRv0	*/
    96  #define ETH_P_FCOE	0x8906		/* Fibre Channel over Ethernet  */
    97  #define ETH_P_TDLS	0x890D          /* TDLS */
    98  #define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
    99  #define ETH_P_80221	0x8917		/* IEEE 802.21 Media Independent Handover Protocol */
   100  #define ETH_P_LOOPBACK	0x9000		/* Ethernet loopback packet, per IEEE 802.3 */
   101  #define ETH_P_QINQ1	0x9100		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
   102  #define ETH_P_QINQ2	0x9200		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
   103  #define ETH_P_QINQ3	0x9300		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
   104  #define ETH_P_EDSA	0xDADA		/* Ethertype DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
   105  #define ETH_P_AF_IUCV   0xFBFB		/* IBM af_iucv [ NOT AN OFFICIALLY REGISTERED ID ] */
   106  
   107  #define ETH_P_802_3_MIN	0x0600		/* If the value in the ethernet type is less than this value
   108  					 * then the frame is Ethernet II. Else it is 802.3 */
   109  
   110  /*
   111   *	Non DIX types. Won't clash for 1500 types.
   112   */
   113  
   114  #define ETH_P_802_3	0x0001		/* Dummy type for 802.3 frames  */
   115  #define ETH_P_AX25	0x0002		/* Dummy protocol id for AX.25  */
   116  #define ETH_P_ALL	0x0003		/* Every packet (be careful!!!) */
   117  #define ETH_P_802_2	0x0004		/* 802.2 frames 		*/
   118  #define ETH_P_SNAP	0x0005		/* Internal only		*/
   119  #define ETH_P_DDCMP     0x0006          /* DEC DDCMP: Internal only     */
   120  #define ETH_P_WAN_PPP   0x0007          /* Dummy type for WAN PPP frames*/
   121  #define ETH_P_PPP_MP    0x0008          /* Dummy type for PPP MP frames */
   122  #define ETH_P_LOCALTALK 0x0009		/* Localtalk pseudo type 	*/
   123  #define ETH_P_CAN	0x000C		/* CAN: Controller Area Network */
   124  #define ETH_P_CANFD	0x000D		/* CANFD: CAN flexible data rate*/
   125  #define ETH_P_PPPTALK	0x0010		/* Dummy type for Atalk over PPP*/
   126  #define ETH_P_TR_802_2	0x0011		/* 802.2 frames 		*/
   127  #define ETH_P_MOBITEX	0x0015		/* Mobitex (kaz@cafe.net)	*/
   128  #define ETH_P_CONTROL	0x0016		/* Card specific control frames */
   129  #define ETH_P_IRDA	0x0017		/* Linux-IrDA			*/
   130  #define ETH_P_ECONET	0x0018		/* Acorn Econet			*/
   131  #define ETH_P_HDLC	0x0019		/* HDLC frames			*/
   132  #define ETH_P_ARCNET	0x001A		/* 1A for ArcNet :-)            */
   133  #define ETH_P_DSA	0x001B		/* Distributed Switch Arch.	*/
   134  #define ETH_P_TRAILER	0x001C		/* Trailer switch tagging	*/
   135  #define ETH_P_PHONET	0x00F5		/* Nokia Phonet frames          */
   136  #define ETH_P_IEEE802154 0x00F6		/* IEEE802.15.4 frame		*/
   137  #define ETH_P_CAIF	0x00F7		/* ST-Ericsson CAIF protocol	*/
   138  #define ETH_P_XDSA	0x00F8		/* Multiplexed DSA protocol	*/
   139  
   140  /*
   141   *	This is an Ethernet frame header.
   142   */
   143  
   144  struct ethhdr {
   145  	unsigned char	h_dest[ETH_ALEN];	/* destination eth addr	*/
   146  	unsigned char	h_source[ETH_ALEN];	/* source ether addr	*/
   147  	__be16		h_proto;		/* packet type ID field	*/
   148  } __attribute__((packed));