O_LAYER2_MAC_DST
(*cmd)->opcode = O_LAYER2_MAC_DST;
keyword(MODULE_LAYER2_ID, O_LAYER2_MAC_DST, "mac-to", TO);
function(MODULE_LAYER2_ID, O_LAYER2_MAC_DST,
O_LAYER2_MAC_DST, (filter_func)check_mac_to);