MPC_OBJECT_IFNET
MPC_FLAG(ifnet_init_label, MPC_OBJECT_IFNET);
if (mac_labeled & MPC_OBJECT_IFNET) { \
if (mac_labeled & MPC_OBJECT_IFNET)
if (!(mac_labeled & MPC_OBJECT_IFNET))
if (!(mac_labeled & MPC_OBJECT_IFNET))