NL_RTA_RTFLAGS
snl_add_msg_attr_u32(&nw, NL_RTA_RTFLAGS, rtm_flags);
{ .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 },
nlattr_add_u32(nw, NL_RTA_RTFLAGS, base_rtflags);
nlattr_add_u32(nw, NL_RTA_RTFLAGS, rtflags);
nlattr_add_u32(nw, NL_RTA_RTFLAGS, rtflags);
{ .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = nlattr_get_uint32 },