1 /* 2 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 1986 Regents of the University of California. 8 * All rights reserved. The Berkeley software License Agreement 9 * specifies the terms and conditions for redistribution. 10 */ 11 12 #ifndef _NET_IF_ARP_H 13 #define _NET_IF_ARP_H 14 15 #pragma ident "%Z%%M% %I% %E% SMI" 16 /* if_arp.h 1.5 88/08/19 SMI; from UCB 7.1 1/24/86 */ 17 18 #include <sys/types.h> 19 #include <sys/socket.h> 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 /* 26 * Address Resolution Protocol. 27 * 28 * See RFC 826 for protocol description. ARP packets are variable 29 * in size; the arphdr structure defines the fixed-length portion. 30 * Protocol type values are the same as those for 10 Mb/s Ethernet. 31 * It is followed by the variable-sized fields ar_sha, arp_spa, 32 * arp_tha and arp_tpa in that order, according to the lengths 33 * specified. Field names used correspond to RFC 826. 34 */ 35 struct arphdr { 36 ushort_t ar_hrd; /* format of hardware address */ 37 #define ARPHRD_ETHER 1 /* ethernet hardware address */ 38 #define ARPHRD_IEEE802 6 /* IEEE 802 hardware address */ 39 #define ARPHRD_FRAME 15 /* Frame relay */ 40 #define ARPHRD_ATM 16 /* ATM */ 41 #define ARPHRD_HDLC 17 /* HDLC */ 42 #define ARPHRD_FC 18 /* Fibre Channel RFC 4338 */ 43 #define ARPHRD_IPATM 19 /* ATM RFC 2225 */ 44 #define ARPHRD_TUNNEL 31 /* IPsec Tunnel RFC 3456 */ 45 #define ARPHRD_IB 32 /* IPoIB hardware address */ 46 ushort_t ar_pro; /* format of protocol address */ 47 uchar_t ar_hln; /* length of hardware address */ 48 uchar_t ar_pln; /* length of protocol address */ 49 ushort_t ar_op; /* one of: */ 50 #define ARPOP_REQUEST 1 /* request to resolve address */ 51 #define ARPOP_REPLY 2 /* response to previous request */ 52 #define REVARP_REQUEST 3 /* Reverse ARP request */ 53 #define REVARP_REPLY 4 /* Reverse ARP reply */ 54 /* 55 * The remaining fields are variable in size, 56 * according to the sizes above, and are defined 57 * as appropriate for specific hardware/protocol 58 * combinations. (E.g., see <netinet/if_ether.h>.) 59 */ 60 #ifdef notdef 61 uchar_t ar_sha[]; /* sender hardware address */ 62 uchar_t ar_spa[]; /* sender protocol address */ 63 uchar_t ar_tha[]; /* target hardware address */ 64 uchar_t ar_tpa[]; /* target protocol address */ 65 #endif /* notdef */ 66 }; 67 68 /* Maximum hardware and protocol address length */ 69 #define ARP_MAX_ADDR_LEN 255 70 71 /* 72 * Extended ARP ioctl request 73 */ 74 struct xarpreq { 75 struct sockaddr_storage xarp_pa; /* protocol address */ 76 struct sockaddr_dl xarp_ha; /* hardware address */ 77 int xarp_flags; /* flags */ 78 }; 79 80 /* 81 * BSD ARP ioctl request 82 */ 83 struct arpreq { 84 struct sockaddr arp_pa; /* protocol address */ 85 struct sockaddr arp_ha; /* hardware address */ 86 int arp_flags; /* flags */ 87 }; 88 /* arp_flags field values */ 89 #define ATF_INUSE 0x01 /* entry in use */ 90 #define ATF_COM 0x02 /* completed entry (enaddr valid) */ 91 #define ATF_PERM 0x04 /* permanent entry */ 92 #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ 93 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 94 #define ATF_AUTHORITY 0x20 /* hardware address is authoritative */ 95 96 /* 97 * This data structure is used by kernel protocol modules to register 98 * their interest in a particular packet type with the Ethernet drivers. 99 * For example, other kinds of ARP would use this, XNS, ApleTalk, etc. 100 */ 101 struct ether_family { 102 int ef_family; /* address family */ 103 ushort_t ef_ethertype; /* ethernet type field */ 104 struct ifqueue *(*ef_infunc)(); /* input function */ 105 int (*ef_outfunc)(); /* output function */ 106 int (*ef_netisr)(); /* soft interrupt function */ 107 struct ether_family *ef_next; /* link to next on list */ 108 }; 109 110 #ifdef __cplusplus 111 } 112 #endif 113 114 #endif /* _NET_IF_ARP_H */ 115