/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              Global definitions for the Ethernet IEEE 802.3 interface.
 *
 * Version:     @(#)if_ether.h  1.0.1a  02/08/94
 *
 * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *              Donald Becker, <becker@super.org>
 *              Alan Cox, <alan@lxorguk.ukuu.org.uk>
 *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
 */
#ifndef _LINUX_IF_ETHER_H
#define _LINUX_IF_ETHER_H

#include <linux/skbuff.h>
#include <uapi/linux/if_ether.h>

/* XX:XX:XX:XX:XX:XX */
#define MAC_ADDR_STR_LEN (3 * ETH_ALEN - 1)

static inline struct ethhdr *eth_hdr(const struct sk_buff *skb)
{
        return (struct ethhdr *)skb_mac_header(skb);
}

/* Prefer this version in TX path, instead of
 * skb_reset_mac_header() + eth_hdr()
 */
static inline struct ethhdr *skb_eth_hdr(const struct sk_buff *skb)
{
        return (struct ethhdr *)skb->data;
}

static inline struct ethhdr *inner_eth_hdr(const struct sk_buff *skb)
{
        return (struct ethhdr *)skb_inner_mac_header(skb);
}

int eth_header_parse(const struct sk_buff *skb, const struct net_device *dev,
                     unsigned char *haddr);

extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);

#endif  /* _LINUX_IF_ETHER_H */