| /*- |
| * Copyright (c) 1986, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 |
| * $FreeBSD: src/sys/net/if_arp.h,v 1.24.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $ |
| */ |
| |
| #ifndef _BSD_NET_IF_ARP_H_ |
| #define _BSD_NET_IF_ARP_H_ |
| |
| /* |
| * Address Resolution Protocol. |
| * |
| * See RFC 826 for protocol description. ARP packets are variable |
| * in size; the arphdr structure defines the fixed-length portion. |
| * Protocol type values are the same as those for 10 Mb/s Ethernet. |
| * It is followed by the variable-sized fields ar_sha, arp_spa, |
| * arp_tha and arp_tpa in that order, according to the lengths |
| * specified. Field names used correspond to RFC 826. |
| */ |
| struct arphdr { |
| u_short ar_hrd; /* format of hardware address */ |
| #define ARPHRD_ETHER 1 /* ethernet hardware format */ |
| #define ARPHRD_IEEE802 6 /* token-ring hardware format */ |
| #define ARPHRD_ARCNET 7 /* arcnet hardware format */ |
| #define ARPHRD_FRELAY 15 /* frame relay hardware format */ |
| #define ARPHRD_IEEE1394 24 /* firewire hardware format */ |
| u_short ar_pro; /* format of protocol address */ |
| u_char ar_hln; /* length of hardware address */ |
| u_char ar_pln; /* length of protocol address */ |
| u_short ar_op; /* one of: */ |
| #define ARPOP_REQUEST 1 /* request to resolve address */ |
| #define ARPOP_REPLY 2 /* response to previous request */ |
| #define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ |
| #define ARPOP_REVREPLY 4 /* response giving protocol address */ |
| #define ARPOP_INVREQUEST 8 /* request to identify peer */ |
| #define ARPOP_INVREPLY 9 /* response identifying peer */ |
| /* |
| * The remaining fields are variable in size, |
| * according to the sizes above. |
| */ |
| #ifdef COMMENT_ONLY |
| u_char ar_sha[]; /* sender hardware address */ |
| u_char ar_spa[]; /* sender protocol address */ |
| u_char ar_tha[]; /* target hardware address */ |
| u_char ar_tpa[]; /* target protocol address */ |
| #endif |
| }; |
| |
| #define ar_sha(ap) (((caddr_t)((ap)+1)) + 0) |
| #define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln) |
| #define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln) |
| #define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln) |
| |
| #define arphdr_len2(ar_hln, ar_pln) \ |
| (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln)) |
| #define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln)) |
| |
| /* |
| * ARP ioctl request |
| */ |
| struct arpreq { |
| struct sockaddr arp_pa; /* protocol address */ |
| struct sockaddr arp_ha; /* hardware address */ |
| int arp_flags; /* flags */ |
| }; |
| /* arp_flags and at_flags field values */ |
| #define ATF_INUSE 0x01 /* entry in use */ |
| #define ATF_COM 0x02 /* completed entry (enaddr valid) */ |
| #define ATF_PERM 0x04 /* permanent entry */ |
| #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ |
| #define ATF_USETRAILERS 0x10 /* has requested trailers */ |
| |
| #ifdef _FREEBSD_KERNEL |
| /* |
| * Structure shared between the ethernet driver modules and |
| * the address resolution code. |
| */ |
| struct arpcom { |
| struct ifnet *ac_ifp; /* network-visible interface */ |
| void *ac_netgraph; /* ng_ether(4) netgraph node info */ |
| }; |
| #define IFP2AC(ifp) ((struct arpcom *)(ifp->if_l2com)) |
| #define AC2IFP(ac) ((ac)->ac_ifp) |
| |
| #endif |
| |
| #endif /* !_BSD_NET_IF_ARP_H_ */ |
