PF_RUT_OP
snl_add_msg_attr_u8(nw, PF_RUT_OP, uid->op);
{ .type = PF_RUT_OP, .off = _OUT(op), .cb = snl_attr_get_uint8 },
{ .type = PF_RUT_OP, .off = _OUT(op), .cb = nlattr_get_uint8 },
nlattr_add_u8(nw, PF_RUT_OP, u->op);