if_arp.h revision 253081
180709Sjake/*- 281180Sjake * Copyright (c) 1986, 1993 381180Sjake * The Regents of the University of California. All rights reserved. 481180Sjake * 581180Sjake * Redistribution and use in source and binary forms, with or without 681180Sjake * modification, are permitted provided that the following conditions 781180Sjake * are met: 881180Sjake * 1. Redistributions of source code must retain the above copyright 981180Sjake * notice, this list of conditions and the following disclaimer. 1081180Sjake * 2. Redistributions in binary form must reproduce the above copyright 1181180Sjake * notice, this list of conditions and the following disclaimer in the 1281180Sjake * documentation and/or other materials provided with the distribution. 1381180Sjake * 4. Neither the name of the University nor the names of its contributors 1481180Sjake * may be used to endorse or promote products derived from this software 1581180Sjake * without specific prior written permission. 1681180Sjake * 1781180Sjake * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1881180Sjake * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1981180Sjake * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2081180Sjake * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2181180Sjake * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2281180Sjake * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2381180Sjake * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2481180Sjake * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2581180Sjake * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2681180Sjake * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2781180Sjake * SUCH DAMAGE. 28114085Sobrien * 2981180Sjake * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 3081180Sjake * $FreeBSD: head/sys/net/if_arp.h 253081 2013-07-09 09:32:06Z ae $ 3180709Sjake */ 3280709Sjake 3380709Sjake#ifndef _NET_IF_ARP_H_ 3480709Sjake#define _NET_IF_ARP_H_ 3580709Sjake 3680709Sjake/* 3780709Sjake * Address Resolution Protocol. 3880709Sjake * 3980709Sjake * See RFC 826 for protocol description. ARP packets are variable 4080709Sjake * in size; the arphdr structure defines the fixed-length portion. 4180709Sjake * Protocol type values are the same as those for 10 Mb/s Ethernet. 4280709Sjake * It is followed by the variable-sized fields ar_sha, arp_spa, 4381337Sobrien * arp_tha and arp_tpa in that order, according to the lengths 4480709Sjake * specified. Field names used correspond to RFC 826. 4580709Sjake */ 4681337Sobrienstruct arphdr { 4780709Sjake u_short ar_hrd; /* format of hardware address */ 4880709Sjake#define ARPHRD_ETHER 1 /* ethernet hardware format */ 4980709Sjake#define ARPHRD_IEEE802 6 /* token-ring hardware format */ 5080709Sjake#define ARPHRD_ARCNET 7 /* arcnet hardware format */ 5180709Sjake#define ARPHRD_FRELAY 15 /* frame relay hardware format */ 5280709Sjake#define ARPHRD_IEEE1394 24 /* firewire hardware format */ 5380709Sjake#define ARPHRD_INFINIBAND 32 /* infiniband hardware format */ 5480709Sjake u_short ar_pro; /* format of protocol address */ 5580709Sjake u_char ar_hln; /* length of hardware address */ 56114188Sjake u_char ar_pln; /* length of protocol address */ 57114188Sjake u_short ar_op; /* one of: */ 58114188Sjake#define ARPOP_REQUEST 1 /* request to resolve address */ 59106050Sjake#define ARPOP_REPLY 2 /* response to previous request */ 6080709Sjake#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ 6180709Sjake#define ARPOP_REVREPLY 4 /* response giving protocol address */ 6280709Sjake#define ARPOP_INVREQUEST 8 /* request to identify peer */ 6380709Sjake#define ARPOP_INVREPLY 9 /* response identifying peer */ 64166105Smarius/* 65166105Smarius * The remaining fields are variable in size, 66166105Smarius * according to the sizes above. 6782906Sjake */ 68166105Smarius#ifdef COMMENT_ONLY 6982906Sjake u_char ar_sha[]; /* sender hardware address */ 7080709Sjake u_char ar_spa[]; /* sender protocol address */ 71166105Smarius u_char ar_tha[]; /* target hardware address */ 7282906Sjake u_char ar_tpa[]; /* target protocol address */ 73166105Smarius#endif 7482906Sjake}; 7580709Sjake 7680709Sjake#define ar_sha(ap) (((caddr_t)((ap)+1)) + 0) 7780709Sjake#define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln) 78216803Smarius#define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln) 79216803Smarius#define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln) 80216803Smarius 81216803Smarius#define arphdr_len2(ar_hln, ar_pln) \ 82216803Smarius (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln)) 83216803Smarius#define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln)) 84101653Sjake 8588644Sjake/* 8688644Sjake * ARP ioctl request 8788644Sjake */ 8888644Sjakestruct arpreq { 8988644Sjake struct sockaddr arp_pa; /* protocol address */ 9082005Sjake struct sockaddr arp_ha; /* hardware address */ 91216803Smarius int arp_flags; /* flags */ 9288644Sjake}; 93216803Smarius/* arp_flags and at_flags field values */ 9488644Sjake#define ATF_INUSE 0x01 /* entry in use */ 95216803Smarius#define ATF_COM 0x02 /* completed entry (enaddr valid) */ 9688644Sjake#define ATF_PERM 0x04 /* permanent entry */ 97216803Smarius#define ATF_PUBL 0x08 /* publish entry (respond for other host) */ 9888644Sjake#define ATF_USETRAILERS 0x10 /* has requested trailers */ 9988644Sjake 10088644Sjake#ifdef _KERNEL 10188644Sjake/* 102216803Smarius * Structure shared between the ethernet driver modules and 103216803Smarius * the address resolution code. 10488644Sjake */ 10588644Sjakestruct arpcom { 10682906Sjake struct ifnet *ac_ifp; /* network-visible interface */ 10782906Sjake void *ac_netgraph; /* ng_ether(4) netgraph node info */ 10882906Sjake}; 10982906Sjake#define IFP2AC(ifp) ((struct arpcom *)(ifp->if_l2com)) 11082906Sjake#define AC2IFP(ac) ((ac)->ac_ifp) 11182005Sjake 11280709Sjake#endif /* _KERNEL */ 11382906Sjake 11482906Sjakestruct arpstat { 11582906Sjake /* Normal things that happen: */ 11682906Sjake uint64_t txrequests; /* # of ARP requests sent by this host. */ 11782906Sjake uint64_t txreplies; /* # of ARP replies sent by this host. */ 11882906Sjake uint64_t rxrequests; /* # of ARP requests received by this host. */ 11982906Sjake uint64_t rxreplies; /* # of ARP replies received by this host. */ 12082906Sjake uint64_t received; /* # of ARP packets received by this host. */ 12182906Sjake 12282906Sjake uint64_t arp_spares[4]; /* For either the upper or lower half. */ 12382906Sjake /* Abnormal event and error counting: */ 12482906Sjake uint64_t dropped; /* # of packets dropped waiting for a reply. */ 12582906Sjake uint64_t timeouts; /* # of times with entries removed */ 12682906Sjake /* due to timeout. */ 12782906Sjake uint64_t dupips; /* # of duplicate IPs detected. */ 12882906Sjake}; 12982906Sjake 13080709Sjake/* 13182906Sjake * In-kernel consumers can use these accessor macros directly to update 13282906Sjake * stats. 13382906Sjake */ 13482906Sjake#define ARPSTAT_ADD(name, val) V_arpstat.name += (val) 13582906Sjake#define ARPSTAT_SUB(name, val) V_arpstat.name -= (val) 13682906Sjake#define ARPSTAT_INC(name) ARPSTAT_ADD(name, 1) 13782906Sjake#define ARPSTAT_DEC(name) ARPSTAT_SUB(name, 1) 13882906Sjake 13982906Sjake#endif /* !_NET_IF_ARP_H_ */ 14082906Sjake