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//==========================================================================
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//
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// include/netinet/if_ether.h
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//
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//
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD or other sources,
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// and are covered by the appropriate copyright disclaimers included herein.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2000-01-10
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// Purpose:
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// Description:
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//
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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/* $OpenBSD: if_ether.h,v 1.10 1999/12/08 06:50:19 itojun Exp $ */
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/* $NetBSD: if_ether.h,v 1.22 1996/05/11 13:00:00 mycroft Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ether.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IF_ETHER_H_
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#define _NETINET_IF_ETHER_H_
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/*
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* Ethernet address - 6 octets
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* this is only used by the ethers(3) functions.
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*/
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struct ether_addr {
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u_int8_t ether_addr_octet[6];
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} __attribute__ ((aligned(1), packed));
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/*
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* Structure of a Ethernet header.
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*/
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#define ETHER_ADDR_LEN 6
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struct ether_header {
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u_int8_t ether_dhost[ETHER_ADDR_LEN];
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u_int8_t ether_shost[ETHER_ADDR_LEN];
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u_int16_t ether_type;
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} __attribute__ ((aligned(1), packed));
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#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
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#define ETHERTYPE_IP 0x0800 /* IP protocol */
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#define ETHERTYPE_ARP 0x0806 /* address resolution protocol */
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#define ETHERTYPE_REVARP 0x8035 /* reverse addr resolution protocol */
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#define ETHERTYPE_IPV6 0x86DD /* IPv6 protocol */
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/*
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* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
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* (type-ETHERTYPE_TRAIL)*512 bytes of data followed
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* by an ETHER type (as given above) and then the (variable-length) header.
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*/
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#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
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#define ETHERTYPE_NTRAILER 16
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#define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
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#define ETHERMTU 1500
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#define ETHERMIN (60-14)
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#ifdef _KERNEL
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/*
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* Macro to map an IP multicast address to an Ethernet multicast address.
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* The high-order 25 bits of the Ethernet address are statically assigned,
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* and the low-order 23 bits are taken from the low end of the IP address.
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*/
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#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
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/* struct in_addr *ipaddr; */ \
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/* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \
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{ \
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(enaddr)[0] = 0x01; \
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(enaddr)[1] = 0x00; \
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(enaddr)[2] = 0x5e; \
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(enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \
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(enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \
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(enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \
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}
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/*
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* Macro to map an IPv6 multicast address to an Ethernet multicast address.
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* The high-order 16 bits of the Ethernet address are statically assigned,
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* and the low-order 32 bits are taken from the low end of the IPv6 address.
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*/
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#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
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/* struct in6_addr *ip6addr; */ \
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/* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \
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{ \
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(enaddr)[0] = 0x33; \
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(enaddr)[1] = 0x33; \
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(enaddr)[2] = ((u_int8_t *)ip6addr)[12]; \
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(enaddr)[3] = ((u_int8_t *)ip6addr)[13]; \
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(enaddr)[4] = ((u_int8_t *)ip6addr)[14]; \
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(enaddr)[5] = ((u_int8_t *)ip6addr)[15]; \
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}
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#endif
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/*
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* Ethernet Address Resolution Protocol.
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*
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* See RFC 826 for protocol description. Structure below is adapted
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* to resolving internet addresses. Field names used correspond to
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* RFC 826.
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*/
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struct ether_arp {
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struct arphdr ea_hdr; /* fixed-size header */
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u_int8_t arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */
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u_int8_t arp_spa[4]; /* sender protocol address */
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u_int8_t arp_tha[ETHER_ADDR_LEN]; /* target hardware address */
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u_int8_t arp_tpa[4]; /* target protocol address */
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};
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#define arp_hrd ea_hdr.ar_hrd
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#define arp_pro ea_hdr.ar_pro
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#define arp_hln ea_hdr.ar_hln
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#define arp_pln ea_hdr.ar_pln
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#define arp_op ea_hdr.ar_op
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/*
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* Structure shared between the ethernet driver modules and
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* the address resolution code. For example, each ec_softc or il_softc
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* begins with this structure.
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*/
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struct arpcom {
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struct ifnet ac_if; /* network-visible interface */
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u_int8_t ac_enaddr[ETHER_ADDR_LEN]; /* ethernet hardware address */
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char ac__pad[2]; /* pad for some machines */
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LIST_HEAD(, ether_multi) ac_multiaddrs; /* list of ether multicast addrs */
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int ac_multicnt; /* length of ac_multiaddrs list */
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};
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struct llinfo_arp {
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LIST_ENTRY(llinfo_arp) la_list;
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struct rtentry *la_rt;
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struct mbuf *la_hold; /* last packet until resolved/timeout */
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long la_asked; /* last time we QUERIED for this addr */
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#define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */
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};
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struct sockaddr_inarp {
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u_int8_t sin_len;
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u_int8_t sin_family;
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u_int16_t sin_port;
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struct in_addr sin_addr;
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struct in_addr sin_srcaddr;
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u_int16_t sin_tos;
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u_int16_t sin_other;
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#define SIN_PROXY 1
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};
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/*
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* IP and ethernet specific routing flags
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*/
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#define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
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#define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
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#define RTF_PERMANENT_ARP RTF_PROTO3 /* only manual overwrite of entry */
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#ifdef _KERNEL
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extern u_int8_t etherbroadcastaddr[ETHER_ADDR_LEN];
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extern u_int8_t ether_ipmulticast_min[ETHER_ADDR_LEN];
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extern u_int8_t ether_ipmulticast_max[ETHER_ADDR_LEN];
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extern struct ifqueue arpintrq;
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void arpwhohas __P((struct arpcom *, struct in_addr *));
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void arpintr __P((void));
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int arpresolve __P((struct arpcom *,
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struct rtentry *, struct mbuf *, struct sockaddr *, u_char *));
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void arp_ifinit __P((struct arpcom *, struct ifaddr *));
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void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
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int ether_addmulti __P((struct ifreq *, struct arpcom *));
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int ether_delmulti __P((struct ifreq *, struct arpcom *));
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#endif /* _KERNEL */
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/*
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* Ethernet multicast address structure. There is one of these for each
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* multicast address or range of multicast addresses that we are supposed
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* to listen to on a particular interface. They are kept in a linked list,
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* rooted in the interface's arpcom structure. (This really has nothing to
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* do with ARP, or with the Internet address family, but this appears to be
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* the minimally-disrupting place to put it.)
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*/
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struct ether_multi {
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u_int8_t enm_addrlo[ETHER_ADDR_LEN]; /* low or only address of range */
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u_int8_t enm_addrhi[ETHER_ADDR_LEN]; /* high or only address of range */
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struct arpcom *enm_ac; /* back pointer to arpcom */
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u_int enm_refcount; /* no. claims to this addr/range */
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LIST_ENTRY(ether_multi) enm_list;
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};
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/*
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* Structure used by macros below to remember position when stepping through
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* all of the ether_multi records.
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*/
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struct ether_multistep {
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struct ether_multi *e_enm;
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};
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/*
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* Macro for looking up the ether_multi record for a given range of Ethernet
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* multicast addresses connected to a given arpcom structure. If no matching
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* record is found, "enm" returns NULL.
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*/
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#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
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/* u_int8_t addrlo[ETHER_ADDR_LEN]; */ \
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/* u_int8_t addrhi[ETHER_ADDR_LEN]; */ \
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/* struct arpcom *ac; */ \
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/* struct ether_multi *enm; */ \
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{ \
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| 259 |
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for ((enm) = (ac)->ac_multiaddrs.lh_first; \
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| 260 |
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(enm) != NULL && \
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(bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
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| 262 |
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bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
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| 263 |
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(enm) = (enm)->enm_list.le_next); \
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| 264 |
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}
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| 265 |
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| 266 |
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/*
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| 267 |
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* Macro to step through all of the ether_multi records, one at a time.
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| 268 |
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* The current position is remembered in "step", which the caller must
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| 269 |
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* provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
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| 270 |
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* and get the first record. Both macros return a NULL "enm" when there
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| 271 |
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* are no remaining records.
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| 272 |
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*/
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| 273 |
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#define ETHER_NEXT_MULTI(step, enm) \
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| 274 |
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/* struct ether_multistep step; */ \
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| 275 |
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/* struct ether_multi *enm; */ \
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| 276 |
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{ \
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| 277 |
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if (((enm) = (step).e_enm) != NULL) \
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| 278 |
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(step).e_enm = (enm)->enm_list.le_next; \
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| 279 |
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}
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| 280 |
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| 281 |
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#define ETHER_FIRST_MULTI(step, ac, enm) \
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| 282 |
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/* struct ether_multistep step; */ \
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| 283 |
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/* struct arpcom *ac; */ \
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| 284 |
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/* struct ether_multi *enm; */ \
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| 285 |
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{ \
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| 286 |
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(step).e_enm = (ac)->ac_multiaddrs.lh_first; \
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| 287 |
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ETHER_NEXT_MULTI((step), (enm)); \
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| 288 |
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}
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| 289 |
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| 290 |
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#ifdef _KERNEL
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| 291 |
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| 292 |
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extern struct ifnet *myip_ifp;
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| 293 |
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| 294 |
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void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
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| 295 |
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int arpresolve __P((struct arpcom *, struct rtentry *, struct mbuf *,
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| 296 |
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struct sockaddr *, u_char *));
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| 297 |
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void arpintr __P((void));
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| 298 |
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int arpioctl __P((u_long, caddr_t));
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| 299 |
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void arp_ifinit __P((struct arpcom *, struct ifaddr *));
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| 300 |
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void revarpinput __P((struct mbuf *));
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| 301 |
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void in_revarpinput __P((struct mbuf *));
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| 302 |
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void revarprequest __P((struct ifnet *));
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| 303 |
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int revarpwhoarewe __P((struct ifnet *, struct in_addr *, struct in_addr *));
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| 304 |
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int revarpwhoami __P((struct in_addr *, struct ifnet *));
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| 305 |
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int db_show_arptab __P((void));
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| 306 |
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| 307 |
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#else
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| 308 |
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| 309 |
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char *ether_ntoa __P((struct ether_addr *));
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| 310 |
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struct ether_addr *ether_aton __P((char *));
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| 311 |
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int ether_ntohost __P((char *, struct ether_addr *));
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| 312 |
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int ether_hostton __P((char *, struct ether_addr *));
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| 313 |
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int ether_line __P((char *, struct ether_addr *, char *));
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| 314 |
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| 315 |
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#endif // _KERNEL
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| 316 |
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| 317 |
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#endif // _NETINET_IF_ETHER_H_
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