/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013 Mellanox Technologies, Ltd.
 * All rights reserved.
 * Copyright (c) 2021-2022 The FreeBSD Foundation
 *
 * Portions of this software were developed by Björn Zeeb
 * under sponsorship from the FreeBSD Foundation.
 *
 * 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 unmodified, 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
#ifndef	_LINUXKPI_LINUX_IF_ETHER_H_
#define	_LINUXKPI_LINUX_IF_ETHER_H_

#include <linux/types.h>
#include <linux/skbuff.h>

#include <net/ethernet.h>

#define ETH_HLEN	ETHER_HDR_LEN   /* Total octets in header. */
#ifndef ETH_ALEN
#define ETH_ALEN	ETHER_ADDR_LEN
#endif
#define	ETH_FRAME_LEN	(ETHER_MAX_LEN - ETHER_CRC_LEN)
#define ETH_FCS_LEN     4		/* Octets in the FCS */
#define VLAN_HLEN       4		/* The additional bytes (on top of the Ethernet header)
					 * that VLAN requires. */
/*
 * defined Ethernet Protocol ID's.
 */
#define	ETH_P_ARP	ETHERTYPE_ARP
#define	ETH_P_IP	ETHERTYPE_IP
#define	ETH_P_IPV6	ETHERTYPE_IPV6
#define	ETH_P_MPLS_UC	ETHERTYPE_MPLS
#define	ETH_P_MPLS_MC	ETHERTYPE_MPLS_MCAST
#define	ETH_P_8021Q	ETHERTYPE_VLAN
#define	ETH_P_8021AD	ETHERTYPE_QINQ
#define	ETH_P_PAE	ETHERTYPE_PAE
#define	ETH_P_802_2	ETHERTYPE_8023
#define	ETH_P_IPX	ETHERTYPE_IPX
#define	ETH_P_AARP	ETHERTYPE_AARP
#define	ETH_P_802_3_MIN	0x05DD		/* See comment in sys/net/ethernet.h */
#define	ETH_P_LINK_CTL	0x886C		/* ITU-T G.989.2 */
#define	ETH_P_TDLS	0x890D		/* 802.11z-2010, see wpa. */

struct ethhdr {
	uint8_t		h_dest[ETH_ALEN];
	uint8_t		h_source[ETH_ALEN];
	uint16_t	h_proto;
} __packed;

static inline struct ethhdr *
eth_hdr(const struct sk_buff *skb)
{
	struct ethhdr *hdr;

	hdr = (struct ethhdr *)skb_mac_header(skb);
	return (hdr);
}

#endif	/* _LINUXKPI_LINUX_IF_ETHER_H_ */