O_LAYER2_MAC_SRC
(*cmd)->opcode = O_LAYER2_MAC_SRC;
keyword(MODULE_LAYER2_ID, O_LAYER2_MAC_SRC, "mac-from", FROM);
function(MODULE_LAYER2_ID, O_LAYER2_MAC_SRC,
O_LAYER2_MAC_SRC, (filter_func)check_mac_from);