include/linux/if_ether.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the  BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Global definitions for the Ethernet IEEE 802.3 interface.
   8  *
   9  * Version:     @(#)if_ether.h  1.0.1a  02/08/94
  10  *
  11  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *              Donald Becker, <becker@super.org>
  13  *              Alan Cox, <alan@lxorguk.ukuu.org.uk>
  14  *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
  15  */
  16 #ifndef _LINUX_IF_ETHER_H
  17 #define _LINUX_IF_ETHER_H
  18
  19 #include <linux/skbuff.h>
  20 #include <uapi/linux/if_ether.h>
  21
  22 static inline struct ethhdr *eth_hdr(const struct sk_buff *skb)
  23 {
  24         return (struct ethhdr *)skb_mac_header(skb);
  25 }
  26
  27 /* Prefer this version in TX path, instead of
  28  * skb_reset_mac_header() + eth_hdr()
  29  */
  30 static inline struct ethhdr *skb_eth_hdr(const struct sk_buff *skb)
  31 {
  32         return (struct ethhdr *)skb->data;
  33 }
  34
  35 static inline struct ethhdr *inner_eth_hdr(const struct sk_buff *skb)
  36 {
  37         return (struct ethhdr *)skb_inner_mac_header(skb);
  38 }
  39
  40 int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr);
  41
  42 extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
  43
  44 #endif  /* _LINUX_IF_ETHER_H */