typedef enum tag_role{
	SLAVE = 0,
	MASTER = 1,
	MASTER_CAND = 2,
} role_t;

typedef struct tag_status {
	int sockid;
	int floor;
	int end_dest;
	elev_state_t state;
	role_t role;
	int alive;
	struct tag_status *next;
} status_t;

int get_master_cand_sock();
role_t get_role();
void set_role(role_t r);
void set_alive(int sock, int b);
void set_master_flag();
void set_master_sock(int sock);
int get_master_sock();
int get_master_cand_sock();
void master_init();
void add_slave(int sock);
void set_elev_state(int sock, char str[]);
int find_opt_elev(int call, int floor);