1139823Simp/*- 21541Srgrimes * Copyright (c) 1986, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 291541Srgrimes * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 3050477Speter * $FreeBSD$ 311541Srgrimes */ 321541Srgrimes 332168Spaul#ifndef _NET_IF_ARP_H_ 344507Sbde#define _NET_IF_ARP_H_ 352168Spaul 361541Srgrimes/* 371541Srgrimes * Address Resolution Protocol. 381541Srgrimes * 391541Srgrimes * See RFC 826 for protocol description. ARP packets are variable 401541Srgrimes * in size; the arphdr structure defines the fixed-length portion. 411541Srgrimes * Protocol type values are the same as those for 10 Mb/s Ethernet. 421541Srgrimes * It is followed by the variable-sized fields ar_sha, arp_spa, 431541Srgrimes * arp_tha and arp_tpa in that order, according to the lengths 441541Srgrimes * specified. Field names used correspond to RFC 826. 451541Srgrimes */ 461541Srgrimesstruct arphdr { 471541Srgrimes u_short ar_hrd; /* format of hardware address */ 481541Srgrimes#define ARPHRD_ETHER 1 /* ethernet hardware format */ 4944165Sjulian#define ARPHRD_IEEE802 6 /* token-ring hardware format */ 5084931Sfjoe#define ARPHRD_ARCNET 7 /* arcnet hardware format */ 511541Srgrimes#define ARPHRD_FRELAY 15 /* frame relay hardware format */ 52130407Sdfr#define ARPHRD_IEEE1394 24 /* firewire hardware format */ 53219819Sjeff#define ARPHRD_INFINIBAND 32 /* infiniband hardware format */ 541541Srgrimes u_short ar_pro; /* format of protocol address */ 551541Srgrimes u_char ar_hln; /* length of hardware address */ 561541Srgrimes u_char ar_pln; /* length of protocol address */ 571541Srgrimes u_short ar_op; /* one of: */ 581541Srgrimes#define ARPOP_REQUEST 1 /* request to resolve address */ 591541Srgrimes#define ARPOP_REPLY 2 /* response to previous request */ 601541Srgrimes#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ 611541Srgrimes#define ARPOP_REVREPLY 4 /* response giving protocol address */ 621541Srgrimes#define ARPOP_INVREQUEST 8 /* request to identify peer */ 631541Srgrimes#define ARPOP_INVREPLY 9 /* response identifying peer */ 641541Srgrimes/* 651541Srgrimes * The remaining fields are variable in size, 661541Srgrimes * according to the sizes above. 671541Srgrimes */ 681541Srgrimes#ifdef COMMENT_ONLY 691541Srgrimes u_char ar_sha[]; /* sender hardware address */ 701541Srgrimes u_char ar_spa[]; /* sender protocol address */ 711541Srgrimes u_char ar_tha[]; /* target hardware address */ 721541Srgrimes u_char ar_tpa[]; /* target protocol address */ 731541Srgrimes#endif 741541Srgrimes}; 751541Srgrimes 7684931Sfjoe#define ar_sha(ap) (((caddr_t)((ap)+1)) + 0) 7784931Sfjoe#define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln) 7884931Sfjoe#define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln) 7984931Sfjoe#define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln) 8084931Sfjoe 8184931Sfjoe#define arphdr_len2(ar_hln, ar_pln) \ 8284931Sfjoe (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln)) 8384931Sfjoe#define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln)) 8484931Sfjoe 851541Srgrimes/* 861541Srgrimes * ARP ioctl request 871541Srgrimes */ 881541Srgrimesstruct arpreq { 891541Srgrimes struct sockaddr arp_pa; /* protocol address */ 901541Srgrimes struct sockaddr arp_ha; /* hardware address */ 911541Srgrimes int arp_flags; /* flags */ 921541Srgrimes}; 931541Srgrimes/* arp_flags and at_flags field values */ 941541Srgrimes#define ATF_INUSE 0x01 /* entry in use */ 951541Srgrimes#define ATF_COM 0x02 /* completed entry (enaddr valid) */ 961541Srgrimes#define ATF_PERM 0x04 /* permanent entry */ 971541Srgrimes#define ATF_PUBL 0x08 /* publish entry (respond for other host) */ 981541Srgrimes#define ATF_USETRAILERS 0x10 /* has requested trailers */ 992168Spaul 10055205Speter#ifdef _KERNEL 10132350Seivind/* 10232350Seivind * Structure shared between the ethernet driver modules and 103147256Sbrooks * the address resolution code. 10432350Seivind */ 10532350Seivindstruct arpcom { 106147256Sbrooks struct ifnet *ac_ifp; /* network-visible interface */ 10762143Sarchie void *ac_netgraph; /* ng_ether(4) netgraph node info */ 10832350Seivind}; 109147256Sbrooks#define IFP2AC(ifp) ((struct arpcom *)(ifp->if_l2com)) 110147256Sbrooks#define AC2IFP(ac) ((ac)->ac_ifp) 111128376Sluigi 112196797Sgnn#endif /* _KERNEL */ 11332350Seivind 114196797Sgnnstruct arpstat { 115196797Sgnn /* Normal things that happen: */ 116253081Sae uint64_t txrequests; /* # of ARP requests sent by this host. */ 117253081Sae uint64_t txreplies; /* # of ARP replies sent by this host. */ 118253081Sae uint64_t rxrequests; /* # of ARP requests received by this host. */ 119253081Sae uint64_t rxreplies; /* # of ARP replies received by this host. */ 120253081Sae uint64_t received; /* # of ARP packets received by this host. */ 121196797Sgnn 122253081Sae uint64_t arp_spares[4]; /* For either the upper or lower half. */ 123196797Sgnn /* Abnormal event and error counting: */ 124253081Sae uint64_t dropped; /* # of packets dropped waiting for a reply. */ 125253081Sae uint64_t timeouts; /* # of times with entries removed */ 126196797Sgnn /* due to timeout. */ 127253081Sae uint64_t dupips; /* # of duplicate IPs detected. */ 128196797Sgnn}; 129196797Sgnn 130253084Sae#ifdef _KERNEL 131253084Sae#include <sys/counter.h> 132253084Sae#include <net/vnet.h> 133253084Sae 134253084SaeVNET_PCPUSTAT_DECLARE(struct arpstat, arpstat); 135196797Sgnn/* 136196797Sgnn * In-kernel consumers can use these accessor macros directly to update 137196797Sgnn * stats. 138196797Sgnn */ 139253084Sae#define ARPSTAT_ADD(name, val) \ 140253084Sae VNET_PCPUSTAT_ADD(struct arpstat, arpstat, name, (val)) 141253084Sae#define ARPSTAT_SUB(name, val) ARPSTAT_ADD(name, -(val)) 142196797Sgnn#define ARPSTAT_INC(name) ARPSTAT_ADD(name, 1) 143196797Sgnn#define ARPSTAT_DEC(name) ARPSTAT_SUB(name, 1) 144196797Sgnn 145253084Sae#endif /* _KERNEL */ 146253084Sae 1474507Sbde#endif /* !_NET_IF_ARP_H_ */ 148