1 /* 2 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 1982, 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 _NETINET_ARP_H 13 #define _NETINET_ARP_H 14 15 #pragma ident "%Z%%M% %I% %E% SMI" 16 17 #include <sys/types.h> 18 #include <sys/ethernet.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 * Ethernet Address Resolution Protocol. 73 * 74 * See RFC 826 for protocol description. Structure below is adapted 75 * to resolving internet addresses. Field names used correspond to 76 * RFC 826. 77 */ 78 struct ether_arp { 79 struct arphdr ea_hdr; /* fixed-size header */ 80 struct ether_addr arp_sha; /* sender hardware address */ 81 uchar_t arp_spa[4]; /* sender protocol address */ 82 struct ether_addr arp_tha; /* target hardware address */ 83 uchar_t arp_tpa[4]; /* target protocol address */ 84 }; 85 #define arp_hrd ea_hdr.ar_hrd 86 #define arp_pro ea_hdr.ar_pro 87 #define arp_hln ea_hdr.ar_hln 88 #define arp_pln ea_hdr.ar_pln 89 #define arp_op ea_hdr.ar_op 90 91 /* 92 * ARP ioctl request 93 */ 94 struct arpreq { 95 struct sockaddr arp_pa; /* protocol address */ 96 struct sockaddr arp_ha; /* hardware address */ 97 int arp_flags; /* flags */ 98 }; 99 /* arp_flags field values */ 100 #define ATF_INUSE 0x01 /* entry in use */ 101 #define ATF_COM 0x02 /* completed entry (enaddr valid) */ 102 #define ATF_PERM 0x04 /* permanent entry */ 103 #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ 104 #define ATF_USETRAILERS 0x10 /* has requested trailers */ 105 #define ATF_AUTHORITY 0x20 /* hardware address is authoritative */ 106 107 #ifdef __cplusplus 108 } 109 #endif 110 111 #endif /* _NETINET_ARP_H */ 112