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/*-
 * Copyright (c) 1982, 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_ether.h	8.3 (Berkeley) 5/2/95
 * $FreeBSD: release/9.1.0/sys/netinet/if_ether.h 196995 2009-09-08 21:17:17Z np $
 */

#ifndef _NETINET_IF_ETHER_H_
#define _NETINET_IF_ETHER_H_

#include <net/ethernet.h>
#include <net/if_arp.h>

/*
 * 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[ETHER_ADDR_LEN];	   */ \
{ \
	(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]; \
}
/*
 * Macro to map an IP6 multicast address to an Ethernet multicast address.
 * The high-order 16 bits of the Ethernet address are statically assigned,
 * and the low-order 32 bits are taken from the low end of the IP6 address.
 */
#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)			\
/* struct	in6_addr *ip6addr; */					\
/* u_char	enaddr[ETHER_ADDR_LEN]; */				\
{                                                                       \
	(enaddr)[0] = 0x33;						\
	(enaddr)[1] = 0x33;						\
	(enaddr)[2] = ((u_char *)ip6addr)[12];				\
	(enaddr)[3] = ((u_char *)ip6addr)[13];				\
	(enaddr)[4] = ((u_char *)ip6addr)[14];				\
	(enaddr)[5] = ((u_char *)ip6addr)[15];				\
}

/*
 * 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[ETHER_ADDR_LEN];	/* sender hardware address */
	u_char	arp_spa[4];	/* sender protocol address */
	u_char	arp_tha[ETHER_ADDR_LEN];	/* 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

struct sockaddr_inarp {
	u_char	sin_len;
	u_char	sin_family;
	u_short sin_port;
	struct	in_addr sin_addr;
	struct	in_addr sin_srcaddr;
	u_short	sin_tos;
	u_short	sin_other;
#define SIN_PROXY 1
};
/*
 * IP and ethernet specific routing flags
 */
#define	RTF_USETRAILERS	RTF_PROTO1	/* use trailers */
#define RTF_ANNOUNCE	RTF_PROTO2	/* announce new arp entry */

#ifdef	_KERNEL
extern u_char	ether_ipmulticast_min[ETHER_ADDR_LEN];
extern u_char	ether_ipmulticast_max[ETHER_ADDR_LEN];

struct llentry;
struct ifaddr;

int	arpresolve(struct ifnet *ifp, struct rtentry *rt,
		    struct mbuf *m, struct sockaddr *dst, u_char *desten,
		    struct llentry **lle);
void	arp_ifinit(struct ifnet *, struct ifaddr *);
void	arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);

#include <sys/eventhandler.h>
typedef void (*llevent_arp_update_fn)(void *, struct llentry *);
EVENTHANDLER_DECLARE(arp_update_event, llevent_arp_update_fn);

#endif

#endif

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