ND_RA_FLAG_MANAGED
radv->managed = nd_ra->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED;
(nd_ra->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED) ? 1 : 0);
ra->nd_ra_flags_reserved |= ND_RA_FLAG_MANAGED;
if (p->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)
(ND_RA_FLAG_MANAGED|ND_RA_FLAG_OTHER))