#define STRESS_MESSAGE_TYPE  5
#define STRESS_FLY_TYPE  6

typedef struct {
    long trap;
    long mode;
    long scene;
    long display;
} ModeInfo;

typedef struct {
    long vel;
    long r;
    long p;
    long y;
} FlyInfo;

typedef struct {
    long type;
    union {
	ModeInfo mode;
	FlyInfo fly;
    } u_msg;
} StressControl;