xref: /linux-6.15/include/linux/if_ether.h (revision 6d6c1ba7)

/* 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, <[email protected]>
 *		Donald Becker, <[email protected]>
 *		Alan Cox, <[email protected]>
 *		Steve Whitehouse, <[email protected]>
 */
#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, unsigned char *haddr);

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

#endif	/* _LINUX_IF_ETHER_H */