eth_header (9)

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

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)

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