typedef enum {TRAFFIC_CTL, TRAIN_CTL, TRAFFIC_LOCAL, TRAIN_LOCAL} node_class_t;

typedef struct node_info_t {
	node_class_t class;
	uint8_t id;
} node_info_t;


typedef struct node_descriptor_t {
	uint8_t id;
	char req_serv_name[15];
} node_descriptor_t;