1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Global definitions for the ARP (RFC 826) protocol. 7 * 8 * Version: @(#)if_arp.h 1.0.1 04/16/93 9 * 10 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 11 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. 12 * Ross Biro 13 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 14 * Florian La Roche, 15 * Jonathan Layes <layes@loran.com> 16 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License 20 * as published by the Free Software Foundation; either version 21 * 2 of the License, or (at your option) any later version. 22 */ 23 #ifndef _LINUX_IF_ARP_H 24 #define _LINUX_IF_ARP_H 25 26 #include <linux/netdevice.h> 27 28 /* ARP protocol HARDWARE identifiers. */ 29 #define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */ 30 #define ARPHRD_ETHER 1 /* Ethernet 10Mbps */ 31 #define ARPHRD_EETHER 2 /* Experimental Ethernet */ 32 #define ARPHRD_AX25 3 /* AX.25 Level 2 */ 33 #define ARPHRD_PRONET 4 /* PROnet token ring */ 34 #define ARPHRD_CHAOS 5 /* Chaosnet */ 35 #define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */ 36 #define ARPHRD_ARCNET 7 /* ARCnet */ 37 #define ARPHRD_APPLETLK 8 /* APPLEtalk */ 38 #define ARPHRD_DLCI 15 /* Frame Relay DLCI */ 39 #define ARPHRD_ATM 19 /* ATM */ 40 #define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */ 41 #define ARPHRD_IEEE1394 24 /* IEEE 1394 IPv4 - RFC 2734 */ 42 #define ARPHRD_EUI64 27 /* EUI-64 */ 43 #define ARPHRD_INFINIBAND 32 /* InfiniBand */ 44 45 /* Dummy types for non ARP hardware */ 46 #define ARPHRD_SLIP 256 47 #define ARPHRD_CSLIP 257 48 #define ARPHRD_SLIP6 258 49 #define ARPHRD_CSLIP6 259 50 #define ARPHRD_RSRVD 260 /* Notional KISS type */ 51 #define ARPHRD_ADAPT 264 52 #define ARPHRD_ROSE 270 53 #define ARPHRD_X25 271 /* CCITT X.25 */ 54 #define ARPHRD_HWX25 272 /* Boards with X.25 in firmware */ 55 #define ARPHRD_CAN 280 /* Controller Area Network */ 56 #define ARPHRD_PPP 512 57 #define ARPHRD_CISCO 513 /* Cisco HDLC */ 58 #define ARPHRD_HDLC ARPHRD_CISCO 59 #define ARPHRD_LAPB 516 /* LAPB */ 60 #define ARPHRD_DDCMP 517 /* Digital's DDCMP protocol */ 61 #define ARPHRD_RAWHDLC 518 /* Raw HDLC */ 62 63 #define ARPHRD_TUNNEL 768 /* IPIP tunnel */ 64 #define ARPHRD_TUNNEL6 769 /* IP6IP6 tunnel */ 65 #define ARPHRD_FRAD 770 /* Frame Relay Access Device */ 66 #define ARPHRD_SKIP 771 /* SKIP vif */ 67 #define ARPHRD_LOOPBACK 772 /* Loopback device */ 68 #define ARPHRD_LOCALTLK 773 /* Localtalk device */ 69 #define ARPHRD_FDDI 774 /* Fiber Distributed Data Interface */ 70 #define ARPHRD_BIF 775 /* AP1000 BIF */ 71 #define ARPHRD_SIT 776 /* sit0 device - IPv6-in-IPv4 */ 72 #define ARPHRD_IPDDP 777 /* IP over DDP tunneller */ 73 #define ARPHRD_IPGRE 778 /* GRE over IP */ 74 #define ARPHRD_PIMREG 779 /* PIMSM register interface */ 75 #define ARPHRD_HIPPI 780 /* High Performance Parallel Interface */ 76 #define ARPHRD_ASH 781 /* Nexus 64Mbps Ash */ 77 #define ARPHRD_ECONET 782 /* Acorn Econet */ 78 #define ARPHRD_IRDA 783 /* Linux-IrDA */ 79 /* ARP works differently on different FC media .. so */ 80 #define ARPHRD_FCPP 784 /* Point to point fibrechannel */ 81 #define ARPHRD_FCAL 785 /* Fibrechannel arbitrated loop */ 82 #define ARPHRD_FCPL 786 /* Fibrechannel public loop */ 83 #define ARPHRD_FCFABRIC 787 /* Fibrechannel fabric */ 84 /* 787->799 reserved for fibrechannel media types */ 85 #define ARPHRD_IEEE802_TR 800 /* Magic type ident for TR */ 86 #define ARPHRD_IEEE80211 801 /* IEEE 802.11 */ 87 #define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */ 88 #define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */ 89 #define ARPHRD_IEEE802154 804 90 91 #define ARPHRD_PHONET 820 /* PhoNet media type */ 92 #define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */ 93 #define ARPHRD_CAIF 822 /* CAIF media type */ 94 95 #define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */ 96 #define ARPHRD_NONE 0xFFFE /* zero header length */ 97 98 /* ARP protocol opcodes. */ 99 #define ARPOP_REQUEST 1 /* ARP request */ 100 #define ARPOP_REPLY 2 /* ARP reply */ 101 #define ARPOP_RREQUEST 3 /* RARP request */ 102 #define ARPOP_RREPLY 4 /* RARP reply */ 103 #define ARPOP_InREQUEST 8 /* InARP request */ 104 #define ARPOP_InREPLY 9 /* InARP reply */ 105 #define ARPOP_NAK 10 /* (ATM)ARP NAK */ 106 107 108 /* ARP ioctl request. */ 109 struct arpreq { 110 struct sockaddr arp_pa; /* protocol address */ 111 struct sockaddr arp_ha; /* hardware address */ 112 int arp_flags; /* flags */ 113 struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ 114 char arp_dev[16]; 115 }; 116 117 struct arpreq_old { 118 struct sockaddr arp_pa; /* protocol address */ 119 struct sockaddr arp_ha; /* hardware address */ 120 int arp_flags; /* flags */ 121 struct sockaddr arp_netmask; /* netmask (only for proxy arps) */ 122 }; 123 124 /* ARP Flag values. */ 125 #define ATF_COM 0x02 /* completed entry (ha valid) */ 126 #define ATF_PERM 0x04 /* permanent entry */ 127 #define ATF_PUBL 0x08 /* publish entry */ 128 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 129 #define ATF_NETMASK 0x20 /* want to use a netmask (only 130 for proxy entries) */ 131 #define ATF_DONTPUB 0x40 /* don't answer this addresses */ 132 133 /* 134 * This structure defines an ethernet arp header. 135 */ 136 137 struct arphdr { 138 __be16 ar_hrd; /* format of hardware address */ 139 __be16 ar_pro; /* format of protocol address */ 140 unsigned char ar_hln; /* length of hardware address */ 141 unsigned char ar_pln; /* length of protocol address */ 142 __be16 ar_op; /* ARP opcode (command) */ 143 144 #if 0 145 /* 146 * Ethernet looks like this : This bit is variable sized however... 147 */ 148 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ 149 unsigned char ar_sip[4]; /* sender IP address */ 150 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ 151 unsigned char ar_tip[4]; /* target IP address */ 152 #endif 153 154 }; 155 156 #ifdef __KERNEL__ 157 #include <linux/skbuff.h> 158 arp_hdr(const struct sk_buff * skb)159static inline struct arphdr *arp_hdr(const struct sk_buff *skb) 160 { 161 return (struct arphdr *)skb_network_header(skb); 162 } 163 arp_hdr_len(struct net_device * dev)164static inline int arp_hdr_len(struct net_device *dev) 165 { 166 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ 167 return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; 168 } 169 #endif 170 171 #endif /* _LINUX_IF_ARP_H */ 172