--- /dev/null
+/*!\file inc/netinet/if_ether.h
+ * Ethernet definitions.
+ */
+
+/* Modified for emx by hv 1994
+ *
+ * Copyright (c) 1982, 1986 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 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.
+ *
+ * from: @(#)if_ether.h 7.5 (Berkeley) 6/28/90
+ * $Id: if_ether.h,v 1.8 1994/02/02 05:58:54 hpeyerl Exp $
+ */
+
+#ifndef __NETINET_IF_ETHER_H
+#define __NETINET_IF_ETHER_H
+
+#include <sys/packon.h>
+
+/*
+ * Ethernet address - 6 octets
+ * this is only used by the ethers(3) functions.
+ */
+struct ether_addr {
+ u_char ether_addr_octet[6];
+ };
+
+/*
+ * Structure of a 10Mb/s Ethernet header.
+ */
+struct ether_header {
+ u_char ether_dhost[6];
+ u_char ether_shost[6];
+ u_short ether_type;
+ };
+
+#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
+/* the IBM header corrects the following to 0x608 for OS/2 but I believe
+ * this is just a dirty hack
+ */
+#define ETHERTYPE_ARP 0x0806 /* address resolution protocol */
+#define ETHERTYPE_IP 0x0800 /* IP protocol */
+#define ETHERTYPE_REVARP 0x8035 /* reverse addr resolution protocol */
+
+/*
+ * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
+ * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
+ * by an ETHER type (as given above) and then the (variable-length) header.
+ */
+#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
+#define ETHERTYPE_NTRAILER 16
+
+#define ETHERMTU 1500
+#define ETHERMIN (60-14)
+
+/*
+ * Macro to map an IP multicast address to an Ethernet multicast address.
+ * The high-order 25 bits of the Ethernet address are statically assigned,
+ * and the low-order 23 bits are taken from the low end of the IP address.
+ */
+#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
+ /* struct in_addr *ipaddr; */ \
+ /* u_char enaddr[6]; */ \
+ { \
+ (enaddr)[0] = 0x01; \
+ (enaddr)[1] = 0x00; \
+ (enaddr)[2] = 0x5e; \
+ (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
+ (enaddr)[4] = ((u_char *)ipaddr)[2]; \
+ (enaddr)[5] = ((u_char *)ipaddr)[3]; \
+ }
+
+
+/*
+ * Ethernet Address Resolution Protocol.
+ *
+ * See RFC 826 for protocol description. Structure below is adapted
+ * to resolving internet addresses. Field names used correspond to
+ * RFC 826.
+ */
+struct ether_arp {
+ struct arphdr ea_hdr; /* fixed-size header */
+ u_char arp_sha[6]; /* sender hardware address */
+ u_char arp_spa[4]; /* sender protocol address */
+ u_char arp_tha[6]; /* target hardware address */
+ u_char arp_tpa[4]; /* target protocol address */
+ };
+#define arp_hrd ea_hdr.ar_hrd
+#define arp_pro ea_hdr.ar_pro
+#define arp_hln ea_hdr.ar_hln
+#define arp_pln ea_hdr.ar_pln
+#define arp_op ea_hdr.ar_op
+
+
+/*
+ * Structure shared between the ethernet driver modules and
+ * the address resolution code. For example, each ec_softc or il_softc
+ * begins with this structure.
+ */
+struct arpcom {
+ struct ifnet ac_if; /* network-visible interface */
+ u_char ac_enaddr[6]; /* ethernet hardware address */
+ struct in_addr ac_ipaddr; /* copy of ip address- XXX */
+ struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
+ int ac_multicnt; /* length of ac_multiaddrs list */
+};
+
+/*
+ * Internet to ethernet address resolution table.
+ */
+
+struct arptab {
+ struct in_addr at_iaddr; /* internet address */
+ u_char at_enaddr[6]; /* ethernet address */
+ u_char at_timer; /* minutes since last reference */
+ u_char at_flags; /* flags */
+ struct mbuf *at_hold; /* last packet until resolved/timeout */
+/* only os2 */
+ u_short at_rcf;
+ u_short at_rseg[8];
+ u_long at_millisec;
+ int at_interface;
+};
+
+
+extern u_char etherbroadcastaddr[6];
+extern u_char ether_ipmulticast_min[6];
+extern u_char ether_ipmulticast_max[6];
+
+/*
+ * Ethernet multicast address structure. There is one of these for each
+ * multicast address or range of multicast addresses that we are supposed
+ * to listen to on a particular interface. They are kept in a linked list,
+ * rooted in the interface's arpcom structure. (This really has nothing to
+ * do with ARP, or with the Internet address family, but this appears to be
+ * the minimally-disrupting place to put it.)
+ */
+struct ether_multi {
+ u_char enm_addrlo[6]; /* low or only address of range */
+ u_char enm_addrhi[6]; /* high or only address of range */
+ struct arpcom *enm_ac; /* back pointer to arpcom */
+ u_int enm_refcount; /* no. claims to this addr/range */
+ struct ether_multi *enm_next; /* ptr to next ether_multi */
+ };
+
+/*
+ * Structure used by macros below to remember position when stepping through
+ * all of the ether_multi records.
+ */
+struct ether_multistep {
+ struct ether_multi *e_enm;
+ };
+
+#include <sys/packoff.h>
+
+/*
+ * Macro for looking up the ether_multi record for a given range of Ethernet
+ * multicast addresses connected to a given arpcom structure. If no matching
+ * record is found, "enm" returns NULL.
+ */
+#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
+ /* u_char addrlo[6]; */ \
+ /* u_char addrhi[6]; */ \
+ /* struct arpcom *ac; */ \
+ /* struct ether_multi *enm; */ \
+{ \
+ for ((enm) = (ac)->ac_multiaddrs; \
+ (enm) != NULL && \
+ (bcmp((enm)->enm_addrlo, (addrlo), 6) != 0 || \
+ bcmp((enm)->enm_addrhi, (addrhi), 6) != 0); \
+ (enm) = (enm)->enm_next); \
+}
+
+/*
+ * Macro to step through all of the ether_multi records, one at a time.
+ * The current position is remembered in "step", which the caller must
+ * provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
+ * and get the first record. Both macros return a NULL "enm" when there
+ * are no remaining records.
+ */
+#define ETHER_NEXT_MULTI(step, enm) \
+ /* struct ether_multistep step; */ \
+ /* struct ether_multi *enm; */ \
+{ \
+ if (((enm) = (step).e_enm) != NULL) \
+ (step).e_enm = (enm)->enm_next; \
+}
+
+#define ETHER_FIRST_MULTI(step, ac, enm) \
+ /* struct ether_multistep step; */ \
+ /* struct arpcom *ac; */ \
+ /* struct ether_multi *enm; */ \
+{ \
+ (step).e_enm = (ac)->ac_multiaddrs; \
+ ETHER_NEXT_MULTI((step), (enm)); \
+}
+
+#endif
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