RTF_CHANGED
r->rt_flags |= RTF_CHANGED;
r->rt_flags |= RTF_CHANGED;
r->rt_flags |= RTF_CHANGED;
r->rt_flags |= RTF_CHANGED;
r->rt_flags |= RTF_CHANGED;
r->rt_flags |= RTF_CHANGED;
if (which_routes == CHANGED_ROUTES && !(r->rt_flags & RTF_CHANGED))
r->rt_flags &= ~RTF_CHANGED;