message SessionEvent {
	enum SessionEventType {
		SERVER_IDENTIFICATION = 500;
		SERVER_MESSAGE = 1000;
		SERVER_SHUTDOWN = 1001;
		CONNECTION_CLOSED = 1002;
		USER_MESSAGE = 1003;
		LIST_ROOMS = 1004;
		ADD_TO_LIST = 1005;
		REMOVE_FROM_LIST = 1006;
		USER_JOINED = 1007;
		USER_LEFT = 1008;
		GAME_JOINED = 1009;
	}
	extensions 100 to max;
}