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