centos man page for eth_header

ETH_HEADER(9)						      Network device support						     ETH_HEADER(9)

NAME
       eth_header - create the Ethernet header

SYNOPSIS
       int eth_header(struct sk_buff * skb, struct net_device * dev, unsigned short type, const void * daddr, const void * saddr,
		      unsigned int len);

ARGUMENTS
       skb
	   buffer to alter

       dev
	   source device

       type
	   Ethernet type field

       daddr
	   destination address (NULL leave destination address)

       saddr
	   source address (NULL use device source address)

       len
	   packet length (<= skb->len)

DESCRIPTION
       Set the protocol type. For a packet of type ETH_P_802_3/2 we put the length in here instead.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     ETH_HEADER(9)