#define CTL_NET_ETHERNET_HEADER_SIZE (6+6+2)
CTL_NET_ETHERNET_HEADER_SIZE defines the number of bytes in an Ethernet II header. The Ethernet header comprises six bytes of source MAC address, six bytes of destination MAC address, and two bytes for the EtherType field.
Note that we do not support 802.1Q VLAN tagging nor do we support non-Ethernet LAN protocols that rely on IEEE 802.2 LLC encapsulation at present.