Index: uspace/lib/usb/include/usb/dp.h
===================================================================
--- uspace/lib/usb/include/usb/dp.h	(revision 00c2d0353f86dcf5afd8ee269a54de87fc0d6728)
+++ uspace/lib/usb/include/usb/dp.h	(revision 00c2d0353f86dcf5afd8ee269a54de87fc0d6728)
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * 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 libusb
+ * @{
+ */
+/** @file
+ * @brief USB descriptor parser.
+ */
+#ifndef LIBUSB_DP_H_
+#define LIBUSB_DP_H_
+
+#include <sys/types.h>
+#include <usb/usb.h>
+#include <usb/descriptor.h>
+
+typedef struct {
+	int child;
+	int parent;
+} usb_dp_descriptor_nesting_t;
+
+typedef struct {
+	usb_dp_descriptor_nesting_t *nesting;
+} usb_dp_parser_t;
+
+typedef struct {
+	uint8_t *data;
+	size_t size;
+	void *arg;
+} usb_dp_parser_data_t;
+
+uint8_t *usb_dp_get_nested_descriptor(usb_dp_parser_t *,
+    usb_dp_parser_data_t *, uint8_t *);
+uint8_t *usb_dp_get_sibling_descriptor(usb_dp_parser_t *,
+    usb_dp_parser_data_t *, uint8_t *, uint8_t *);
+
+#endif
+/**
+ * @}
+ */