IO_CLOSED, /* descriptor is dead (socket waiting for removal or timer) */
IO_LISTENING, /* descriptor is waiting for connections (server socket) */
IO_CONNECTING, /* descriptor is waiting for connection approval (connecting client socket) */
IO_CLOSED, /* descriptor is dead (socket waiting for removal or timer) */
IO_LISTENING, /* descriptor is waiting for connections (server socket) */
IO_CONNECTING, /* descriptor is waiting for connection approval (connecting client socket) */