ETH_TYPE_TRANS(9) Network device support ETH_TYPE_TRANS(9)
NAME eth_type_trans - determine the packet´s protocol ID.
SYNOPSIS __be16 eth_type_trans(struct sk_buff * skb, struct net_device * dev);
ARGUMENTS skb received socket data
dev receiving network device
DESCRIPTION The rule here is that we assume 802.3 if the type field is short enough to be a length. This is normal practice and works for any ´now in use´ protocol.
COPYRIGHT Kernel Hackers Manual 2.6. November 2013 ETH_TYPE_TRANS(9)