1 /* 2 * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved. 3 */ 4 5 /* 6 * Copyright (c) 1986 Regents of the University of California. 7 * All rights reserved. The Berkeley software License Agreement 8 * specifies the terms and conditions for redistribution. 9 */ 10 11 #ifndef _NET_IF_ARP_H 12 #define _NET_IF_ARP_H 13 14 /* if_arp.h 1.5 88/08/19 SMI; from UCB 7.1 1/24/86 */ 15 16 #include <sys/types.h> 17 #include <sys/socket.h> 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 23 /* 24 * Address Resolution Protocol. 25 * 26 * See RFC 826 for protocol description. ARP packets are variable 27 * in size; the arphdr structure defines the fixed-length portion. 28 * Protocol type values are the same as those for 10 Mb/s Ethernet. 29 * It is followed by the variable-sized fields ar_sha, arp_spa, 30 * arp_tha and arp_tpa in that order, according to the lengths 31 * specified. Field names used correspond to RFC 826. 32 */ 33 struct arphdr { 34 ushort_t ar_hrd; /* format of hardware address */ 35 #define ARPHRD_ETHER 1 /* ethernet hardware address */ 36 #define ARPHRD_EETHER 2 /* experimental ethernet */ 37 #define ARPHRD_AX25 3 /* amateur readio ax.25 */ 38 #define ARPHRD_CHAOS 5 /* Chaos net */ 39 #define ARPHRD_IEEE802 6 /* IEEE 802 hardware address */ 40 #define ARPHRD_ARCNET 7 /* ARCNET */ 41 #define ARPHRD_FRAME 15 /* Frame relay */ 42 #define ARPHRD_ATM 16 /* ATM */ 43 #define ARPHRD_HDLC 17 /* HDLC */ 44 #define ARPHRD_FC 18 /* Fibre Channel RFC 4338 */ 45 #define ARPHRD_IPATM 19 /* ATM RFC 2225 */ 46 #define ARPHRD_METRICOM 23 /* Metricom */ 47 #define ARPHRD_TUNNEL 31 /* IPsec Tunnel RFC 3456 */ 48 #define ARPHRD_IB 32 /* IPoIB hardware address */ 49 ushort_t ar_pro; /* format of protocol address */ 50 uchar_t ar_hln; /* length of hardware address */ 51 uchar_t ar_pln; /* length of protocol address */ 52 ushort_t ar_op; /* one of: */ 53 #define ARPOP_REQUEST 1 /* request to resolve address */ 54 #define ARPOP_REPLY 2 /* response to previous request */ 55 #define REVARP_REQUEST 3 /* Reverse ARP request */ 56 #define REVARP_REPLY 4 /* Reverse ARP reply */ 57 /* 58 * The remaining fields are variable in size, 59 * according to the sizes above, and are defined 60 * as appropriate for specific hardware/protocol 61 * combinations. (E.g., see <netinet/if_ether.h>.) 62 */ 63 #ifdef notdef 64 uchar_t ar_sha[]; /* sender hardware address */ 65 uchar_t ar_spa[]; /* sender protocol address */ 66 uchar_t ar_tha[]; /* target hardware address */ 67 uchar_t ar_tpa[]; /* target protocol address */ 68 #endif /* notdef */ 69 }; 70 71 /* Maximum hardware and protocol address length */ 72 #define ARP_MAX_ADDR_LEN 255 73 74 /* 75 * Extended ARP ioctl request 76 */ 77 struct xarpreq { 78 struct sockaddr_storage xarp_pa; /* protocol address */ 79 struct sockaddr_dl xarp_ha; /* hardware address */ 80 int xarp_flags; /* flags */ 81 }; 82 83 /* 84 * BSD ARP ioctl request 85 */ 86 struct arpreq { 87 struct sockaddr arp_pa; /* protocol address */ 88 struct sockaddr arp_ha; /* hardware address */ 89 int arp_flags; /* flags */ 90 }; 91 /* arp_flags field values */ 92 #define ATF_INUSE 0x01 /* entry in use */ 93 #define ATF_COM 0x02 /* completed entry (enaddr valid) */ 94 #define ATF_PERM 0x04 /* permanent entry */ 95 #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ 96 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 97 #define ATF_AUTHORITY 0x20 /* hardware address is authoritative */ 98 99 /* 100 * This data structure is used by kernel protocol modules to register 101 * their interest in a particular packet type with the Ethernet drivers. 102 * For example, other kinds of ARP would use this, XNS, ApleTalk, etc. 103 */ 104 struct ether_family { 105 int ef_family; /* address family */ 106 ushort_t ef_ethertype; /* ethernet type field */ 107 struct ifqueue *(*ef_infunc)(); /* input function */ 108 int (*ef_outfunc)(); /* output function */ 109 int (*ef_netisr)(); /* soft interrupt function */ 110 struct ether_family *ef_next; /* link to next on list */ 111 }; 112 113 #ifdef __cplusplus 114 } 115 #endif 116 117 #endif /* _NET_IF_ARP_H */ 118