1 | /* |
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2 | * Copyright (c) 1986, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 4. Neither the name of the University nor the names of its contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | * |
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29 | * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 |
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30 | * $FreeBSD: src/sys/net/if_arp.h,v 1.21 2005/01/07 01:45:34 imp Exp $ |
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31 | */ |
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32 | |
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33 | /* |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NET_IF_ARP_H_ |
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38 | #define _NET_IF_ARP_H_ |
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39 | |
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40 | #include <sys/socket.h> /* struct sockaddr */ |
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41 | |
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42 | /* |
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43 | * Address Resolution Protocol. |
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44 | * |
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45 | * See RFC 826 for protocol description. ARP packets are variable |
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46 | * in size; the arphdr structure defines the fixed-length portion. |
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47 | * Protocol type values are the same as those for 10 Mb/s Ethernet. |
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48 | * It is followed by the variable-sized fields ar_sha, arp_spa, |
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49 | * arp_tha and arp_tpa in that order, according to the lengths |
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50 | * specified. Field names used correspond to RFC 826. |
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51 | */ |
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52 | struct arphdr { |
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53 | u_short ar_hrd; /* format of hardware address */ |
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54 | #define ARPHRD_ETHER 1 /* ethernet hardware format */ |
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55 | #define ARPHRD_IEEE802 6 /* token-ring hardware format */ |
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56 | #define ARPHRD_ARCNET 7 /* arcnet hardware format */ |
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57 | #define ARPHRD_FRELAY 15 /* frame relay hardware format */ |
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58 | #define ARPHRD_IEEE1394 24 /* firewire hardware format */ |
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59 | u_short ar_pro; /* format of protocol address */ |
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60 | u_char ar_hln; /* length of hardware address */ |
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61 | u_char ar_pln; /* length of protocol address */ |
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62 | u_short ar_op; /* one of: */ |
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63 | #define ARPOP_REQUEST 1 /* request to resolve address */ |
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64 | #define ARPOP_REPLY 2 /* response to previous request */ |
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65 | #define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ |
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66 | #define ARPOP_REVREPLY 4 /* response giving protocol address */ |
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67 | #define ARPOP_INVREQUEST 8 /* request to identify peer */ |
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68 | #define ARPOP_INVREPLY 9 /* response identifying peer */ |
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69 | /* |
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70 | * The remaining fields are variable in size, |
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71 | * according to the sizes above. |
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72 | */ |
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73 | #ifdef COMMENT_ONLY |
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74 | u_char ar_sha[]; /* sender hardware address */ |
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75 | u_char ar_spa[]; /* sender protocol address */ |
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76 | u_char ar_tha[]; /* target hardware address */ |
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77 | u_char ar_tpa[]; /* target protocol address */ |
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78 | #endif |
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79 | }; |
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80 | |
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81 | #define ar_sha(ap) (((caddr_t)((ap)+1)) + 0) |
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82 | #define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln) |
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83 | #define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln) |
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84 | #define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln) |
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85 | |
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86 | #define arphdr_len2(ar_hln, ar_pln) \ |
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87 | (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln)) |
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88 | #define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln)) |
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89 | |
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90 | /* |
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91 | * ARP ioctl request |
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92 | */ |
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93 | struct arpreq { |
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94 | struct sockaddr arp_pa; /* protocol address */ |
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95 | struct sockaddr arp_ha; /* hardware address */ |
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96 | int arp_flags; /* flags */ |
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97 | }; |
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98 | /* arp_flags and at_flags field values */ |
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99 | #define ATF_INUSE 0x01 /* entry in use */ |
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100 | #define ATF_COM 0x02 /* completed entry (enaddr valid) */ |
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101 | #define ATF_PERM 0x04 /* permanent entry */ |
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102 | #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ |
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103 | #define ATF_USETRAILERS 0x10 /* has requested trailers */ |
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104 | |
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105 | #ifdef _KERNEL |
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106 | /* |
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107 | * Structure shared between the ethernet driver modules and |
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108 | * the address resolution code. For example, each ec_softc or il_softc |
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109 | * begins with this structure. |
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110 | * The code is written so that each *_softc _must_ begin with a |
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111 | * struct arpcom, which in turn _must_ begin with a struct ifnet. |
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112 | */ |
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113 | struct arpcom { |
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114 | /* |
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115 | * The ifnet struct _must_ be at the head of this structure. |
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116 | */ |
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117 | struct ifnet ac_if; /* network-visible interface */ |
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118 | u_char ac_enaddr[6]; /* ethernet hardware address */ |
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119 | #if defined(__rtems__) |
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120 | /* Cruft from ancient BSD - should be removed once RTEMS is updated */ |
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121 | struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */ |
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122 | int ac_multicnt; /* length of ac_multiaddrs list */ |
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123 | #else |
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124 | int now_unused; /* XXX was length of ac_multiaddrs list */ |
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125 | void *ac_netgraph; /* ng_ether(4) netgraph node info */ |
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126 | #endif |
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127 | }; |
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128 | #define IFP2AC(ifp) ((struct arpcom *)(ifp)) |
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129 | |
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130 | #endif |
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131 | |
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132 | #endif /* !_NET_IF_ARP_H_ */ |
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