github.com/cilium/cilium@v1.16.2/bpf/include/linux/if_arp.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 ARP (RFC 826) protocol.
     9   *
    10   * Version:	@(#)if_arp.h	1.0.1	04/16/93
    11   *
    12   * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
    13   *		Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
    14   *		Ross Biro
    15   *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    16   *		Florian La Roche,
    17   *		Jonathan Layes <layes@loran.com>
    18   *		Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
    19   *
    20   *		This program is free software; you can redistribute it and/or
    21   *		modify it under the terms of the GNU General Public License
    22   *		as published by the Free Software Foundation; either version
    23   *		2 of the License, or (at your option) any later version.
    24   */
    25  #pragma once
    26  
    27  #include <linux/types.h>
    28  
    29  /* ARP protocol HARDWARE identifiers. */
    30  #define ARPHRD_NETROM	0		/* from KA9Q: NET/ROM pseudo	*/
    31  #define ARPHRD_ETHER 	1		/* Ethernet 10Mbps		*/
    32  #define	ARPHRD_EETHER	2		/* Experimental Ethernet	*/
    33  #define	ARPHRD_AX25	3		/* AX.25 Level 2		*/
    34  #define	ARPHRD_PRONET	4		/* PROnet token ring		*/
    35  #define	ARPHRD_CHAOS	5		/* Chaosnet			*/
    36  #define	ARPHRD_IEEE802	6		/* IEEE 802.2 Ethernet/TR/TB	*/
    37  #define	ARPHRD_ARCNET	7		/* ARCnet			*/
    38  #define	ARPHRD_APPLETLK	8		/* APPLEtalk			*/
    39  #define ARPHRD_DLCI	15		/* Frame Relay DLCI		*/
    40  #define ARPHRD_ATM	19		/* ATM 				*/
    41  #define ARPHRD_METRICOM	23		/* Metricom STRIP (new IANA id)	*/
    42  #define	ARPHRD_IEEE1394	24		/* IEEE 1394 IPv4 - RFC 2734	*/
    43  #define ARPHRD_EUI64	27		/* EUI-64                       */
    44  #define ARPHRD_INFINIBAND 32		/* InfiniBand			*/
    45  
    46  /* Dummy types for non ARP hardware */
    47  #define ARPHRD_SLIP	256
    48  #define ARPHRD_CSLIP	257
    49  #define ARPHRD_SLIP6	258
    50  #define ARPHRD_CSLIP6	259
    51  #define ARPHRD_RSRVD	260		/* Notional KISS type 		*/
    52  #define ARPHRD_ADAPT	264
    53  #define ARPHRD_ROSE	270
    54  #define ARPHRD_X25	271		/* CCITT X.25			*/
    55  #define ARPHRD_HWX25	272		/* Boards with X.25 in firmware	*/
    56  #define ARPHRD_CAN	280		/* Controller Area Network      */
    57  #define ARPHRD_PPP	512
    58  #define ARPHRD_CISCO	513		/* Cisco HDLC	 		*/
    59  #define ARPHRD_HDLC	ARPHRD_CISCO
    60  #define ARPHRD_LAPB	516		/* LAPB				*/
    61  #define ARPHRD_DDCMP    517		/* Digital's DDCMP protocol     */
    62  #define ARPHRD_RAWHDLC	518		/* Raw HDLC			*/
    63  
    64  #define ARPHRD_TUNNEL	768		/* IPIP tunnel			*/
    65  #define ARPHRD_TUNNEL6	769		/* IP6IP6 tunnel       		*/
    66  #define ARPHRD_FRAD	770             /* Frame Relay Access Device    */
    67  #define ARPHRD_SKIP	771		/* SKIP vif			*/
    68  #define ARPHRD_LOOPBACK	772		/* Loopback device		*/
    69  #define ARPHRD_LOCALTLK 773		/* Localtalk device		*/
    70  #define ARPHRD_FDDI	774		/* Fiber Distributed Data Interface */
    71  #define ARPHRD_BIF      775             /* AP1000 BIF                   */
    72  #define ARPHRD_SIT	776		/* sit0 device - IPv6-in-IPv4	*/
    73  #define ARPHRD_IPDDP	777		/* IP over DDP tunneller	*/
    74  #define ARPHRD_IPGRE	778		/* GRE over IP			*/
    75  #define ARPHRD_PIMREG	779		/* PIMSM register interface	*/
    76  #define ARPHRD_HIPPI	780		/* High Performance Parallel Interface */
    77  #define ARPHRD_ASH	781		/* Nexus 64Mbps Ash		*/
    78  #define ARPHRD_ECONET	782		/* Acorn Econet			*/
    79  #define ARPHRD_IRDA 	783		/* Linux-IrDA			*/
    80  /* ARP works differently on different FC media .. so  */
    81  #define ARPHRD_FCPP	784		/* Point to point fibrechannel	*/
    82  #define ARPHRD_FCAL	785		/* Fibrechannel arbitrated loop */
    83  #define ARPHRD_FCPL	786		/* Fibrechannel public loop	*/
    84  #define ARPHRD_FCFABRIC	787		/* Fibrechannel fabric		*/
    85  	/* 787->799 reserved for fibrechannel media types */
    86  #define ARPHRD_IEEE802_TR 800		/* Magic type ident for TR	*/
    87  #define ARPHRD_IEEE80211 801		/* IEEE 802.11			*/
    88  #define ARPHRD_IEEE80211_PRISM 802	/* IEEE 802.11 + Prism2 header  */
    89  #define ARPHRD_IEEE80211_RADIOTAP 803	/* IEEE 802.11 + radiotap header */
    90  #define ARPHRD_IEEE802154	  804
    91  #define ARPHRD_IEEE802154_MONITOR 805	/* IEEE 802.15.4 network monitor */
    92  
    93  #define ARPHRD_PHONET	820		/* PhoNet media type		*/
    94  #define ARPHRD_PHONET_PIPE 821		/* PhoNet pipe header		*/
    95  #define ARPHRD_CAIF	822		/* CAIF media type		*/
    96  #define ARPHRD_IP6GRE	823		/* GRE over IPv6		*/
    97  #define ARPHRD_NETLINK	824		/* Netlink header		*/
    98  #define ARPHRD_6LOWPAN	825		/* IPv6 over LoWPAN             */
    99  
   100  #define ARPHRD_VOID	  0xFFFF	/* Void type, nothing is known */
   101  #define ARPHRD_NONE	  0xFFFE	/* zero header length */
   102  
   103  /* ARP protocol opcodes. */
   104  #define	ARPOP_REQUEST	1		/* ARP request			*/
   105  #define	ARPOP_REPLY	2		/* ARP reply			*/
   106  #define	ARPOP_RREQUEST	3		/* RARP request			*/
   107  #define	ARPOP_RREPLY	4		/* RARP reply			*/
   108  #define	ARPOP_InREQUEST	8		/* InARP request		*/
   109  #define	ARPOP_InREPLY	9		/* InARP reply			*/
   110  #define	ARPOP_NAK	10		/* (ATM)ARP NAK			*/
   111  
   112  
   113  /*
   114   *	This structure defines an ethernet arp header.
   115   */
   116  
   117  struct arphdr {
   118  	__be16		ar_hrd;		/* format of hardware address	*/
   119  	__be16		ar_pro;		/* format of protocol address	*/
   120  	unsigned char	ar_hln;		/* length of hardware address	*/
   121  	unsigned char	ar_pln;		/* length of protocol address	*/
   122  	__be16		ar_op;		/* ARP opcode (command)		*/
   123  
   124  #if 0
   125  	 /*
   126  	  *	 Ethernet looks like this : This bit is variable sized however...
   127  	  */
   128  	unsigned char		ar_sha[ETH_ALEN];	/* sender hardware address	*/
   129  	unsigned char		ar_sip[4];		/* sender IP address		*/
   130  	unsigned char		ar_tha[ETH_ALEN];	/* target hardware address	*/
   131  	unsigned char		ar_tip[4];		/* target IP address		*/
   132  #endif
   133  
   134  };