Index: uspace/lib/usbvirt/include/usbvirt/device.h
===================================================================
--- uspace/lib/usbvirt/include/usbvirt/device.h	(revision b997e7b1c887fcaf9ee6d5e50359333226bd57c8)
+++ uspace/lib/usbvirt/include/usbvirt/device.h	(revision 94fbf78519c6a5d5b6009321e986dfa44de82d37)
@@ -239,4 +239,9 @@
 };
 
+
+int req_nop(usbvirt_device_t *device,
+    const usb_device_request_setup_packet_t *setup_packet,
+    uint8_t *data, size_t *act_size);
+
 int usbvirt_device_plug(usbvirt_device_t *, const char *);
 void usbvirt_device_unplug(usbvirt_device_t *);
Index: uspace/lib/usbvirt/include/usbvirt/virthub_base.h
===================================================================
--- uspace/lib/usbvirt/include/usbvirt/virthub_base.h	(revision 94fbf78519c6a5d5b6009321e986dfa44de82d37)
+++ uspace/lib/usbvirt/include/usbvirt/virthub_base.h	(revision 94fbf78519c6a5d5b6009321e986dfa44de82d37)
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2013 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Virtual USB device.
+ */
+
+#ifndef LIBUSBVIRT_VIRTHUB_BASE_H_
+#define LIBUSBVIRT_VIRTHUB_BASE_H_
+
+#include <usbvirt/device.h>
+#include <usb/classes/hub.h>
+
+enum {
+	VIRTHUB_EXTR_DESC = 3,
+	HUB_STATUS_CHANGE_PIPE = 1,
+};
+
+typedef struct {
+	usb_standard_configuration_descriptor_t config_descriptor;
+	usbvirt_device_configuration_extras_t extra[VIRTHUB_EXTR_DESC];
+	usbvirt_device_configuration_t configuration;
+	usbvirt_descriptors_t descriptors;
+	usbvirt_device_t device;
+	void *data;
+} virthub_base_t;
+
+void *virthub_get_data(usbvirt_device_t *dev);
+
+int virthub_base_init(virthub_base_t *instance,
+    const char *name, usbvirt_device_ops_t *ops, void *data,
+    const usb_standard_device_descriptor_t *device_desc,
+    const usb_hub_descriptor_header_t *hub_desc);
+
+usb_address_t virthub_base_get_address(virthub_base_t *instance);
+
+int virthub_base_request(virthub_base_t *instance, usb_target_t target,
+    usb_direction_t dir, const usb_device_request_setup_packet_t *setup,
+    void *buffer, size_t buffer_size, size_t *real_size);
+
+int virthub_base_get_hub_descriptor(usbvirt_device_t *dev,
+    const usb_device_request_setup_packet_t *request, uint8_t *data,
+    size_t *act_size);
+int virthub_base_get_null_status(usbvirt_device_t *dev,
+    const usb_device_request_setup_packet_t *request, uint8_t *data,
+    size_t *act_size);
+
+
+#endif
+
+/**
+ * @}
+ */