NBF_CONNECTED
if (nbp->nbp_flags & NBF_CONNECTED)
nbp->nbp_flags |= NBF_CONNECTED;
if ((nbp->nbp_flags & NBF_CONNECTED) != 0) {
nbp->nbp_flags &= ~NBF_CONNECTED;
if ((nbp->nbp_flags & NBF_CONNECTED) == 0) {
if ((nbp->nbp_flags & NBF_CONNECTED) == 0) {