var msg []byte
		for {
			if atomic.LoadUint32((*uint32)(&c.state)) != StateConnected {
				cancel(ErrDisconnected)
				return
			}
			if cap(msg) > readBufferSize*4 {
				// Don't keep too much memory around.
				msg = nil
			}

			var err error
			msg, err = readDataInto(msg, conn, c.side, ws.OpBinary)
			if err != nil {
				cancel(ErrDisconnected)