net_getlifflags
res = net_getlifflags(ndp, phyif, lif, &flags);
(void) net_getlifflags(ipne->ipne_protocol, ifindex, 0, &ifflags);
(void) net_getlifflags(nd, phyif, 0, &ifflags);
if (net_getlifflags(nd, phyif, lif, &ifflags) != 0 ||
extern int net_getlifflags(net_handle_t, phy_if_t, lif_if_t, uint64_t *);