fastboot/usb_windows.cpp - LeafOS-Project/android_system_core - Gitiles

 /*
  * Copyright (C) 2008 The Android Open Source Project
  * 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.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "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
  * COPYRIGHT OWNER OR CONTRIBUTORS 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.
  */

 #include <windows.h>
 #include <winerror.h>
 #include <errno.h>
 #include <usb100.h>
 #include <adb_api.h>
 #include <stdio.h>
 #include <stdlib.h>

 #include <memory>
 #include <string>

 #include "usb.h"

 //#define TRACE_USB 1
 #if TRACE_USB
 #define DBG(x...) fprintf(stderr, x)
 #else
 #define DBG(x...)
 #endif

 #define MAX_USBFS_BULK_SIZE (1024 * 1024)

 /** Structure usb_handle describes our connection to the usb device via
   AdbWinApi.dll. This structure is returned from usb_open() routine and
   is expected in each subsequent call that is accessing the device.
 */
 struct usb_handle {
     /// Handle to USB interface
     ADBAPIHANDLE  adb_interface;

     /// Handle to USB read pipe (endpoint)
     ADBAPIHANDLE  adb_read_pipe;

     /// Handle to USB write pipe (endpoint)
     ADBAPIHANDLE  adb_write_pipe;

     /// Interface name
     std::string interface_name;
 };

 class WindowsUsbTransport : public UsbTransport {
   public:
     WindowsUsbTransport(std::unique_ptr<usb_handle> handle) : handle_(std::move(handle)) {}
     ~WindowsUsbTransport() override;

     ssize_t Read(void* data, size_t len) override;
     ssize_t Write(const void* data, size_t len) override;
     int Close() override;
     int Reset() override;

   private:
     std::unique_ptr<usb_handle> handle_;

     DISALLOW_COPY_AND_ASSIGN(WindowsUsbTransport);
 };

 /// Class ID assigned to the device by androidusb.sys
 static const GUID usb_class_id = ANDROID_USB_CLASS_ID;

 /// Checks if interface (device) matches certain criteria
 int recognized_device(usb_handle* handle, ifc_match_func callback);

 /// Opens usb interface (device) by interface (device) name.
 std::unique_ptr<usb_handle> do_usb_open(const wchar_t* interface_name);

 /// Cleans up opened usb handle
 void usb_cleanup_handle(usb_handle* handle);

 /// Cleans up (but don't close) opened usb handle
 void usb_kick(usb_handle* handle);


 std::unique_ptr<usb_handle> do_usb_open(const wchar_t* interface_name) {
     // Allocate our handle
     std::unique_ptr<usb_handle> ret(new usb_handle);

     // Create interface.
     ret->adb_interface = AdbCreateInterfaceByName(interface_name);

     if (nullptr == ret->adb_interface) {
         errno = GetLastError();
         DBG("failed to open interface %S\n", interface_name);
         return nullptr;
     }

     // Open read pipe (endpoint)
     ret->adb_read_pipe =
         AdbOpenDefaultBulkReadEndpoint(ret->adb_interface,
                                    AdbOpenAccessTypeReadWrite,
                                    AdbOpenSharingModeReadWrite);
     if (nullptr != ret->adb_read_pipe) {
         // Open write pipe (endpoint)
         ret->adb_write_pipe =
             AdbOpenDefaultBulkWriteEndpoint(ret->adb_interface,
                                       AdbOpenAccessTypeReadWrite,
                                       AdbOpenSharingModeReadWrite);
         if (nullptr != ret->adb_write_pipe) {
             // Save interface name
             unsigned long name_len = 0;

             // First get expected name length
             AdbGetInterfaceName(ret->adb_interface,
                           nullptr,
                           &name_len,
                           true);
             if (0 != name_len) {
                 // Now save the name
                 ret->interface_name.resize(name_len);
                 if (AdbGetInterfaceName(ret->adb_interface,
                               &ret->interface_name[0],
                               &name_len,
                               true)) {
                     // We're done at this point
                     return ret;
                 }
             }
         }
     }

     // Something went wrong.
     errno = GetLastError();
     usb_cleanup_handle(ret.get());
     SetLastError(errno);

     return nullptr;
 }

 ssize_t WindowsUsbTransport::Write(const void* data, size_t len) {
     unsigned long time_out = 5000;
     unsigned long written = 0;
     unsigned count = 0;
     int ret;

     DBG("usb_write %zu\n", len);
     if (nullptr != handle_) {
         // Perform write
         while(len > 0) {
             int xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
             ret = AdbWriteEndpointSync(handle_->adb_write_pipe, const_cast<void*>(data), xfer,
                                        &written, time_out);
             errno = GetLastError();
             DBG("AdbWriteEndpointSync returned %d, errno: %d\n", ret, errno);
             if (ret == 0) {
                 // assume ERROR_INVALID_HANDLE indicates we are disconnected
                 if (errno == ERROR_INVALID_HANDLE)
                 usb_kick(handle_.get());
                 return -1;
             }

             count += written;
             len -= written;
             data = (const char *)data + written;

             if (len == 0)
                 return count;
         }
     } else {
         DBG("usb_write NULL handle\n");
         SetLastError(ERROR_INVALID_HANDLE);
     }

     DBG("usb_write failed: %d\n", errno);

     return -1;
 }

 ssize_t WindowsUsbTransport::Read(void* data, size_t len) {
     unsigned long time_out = 0;
     unsigned long read = 0;
     size_t count = 0;
     int ret;

     DBG("usb_read %zu\n", len);
     if (nullptr != handle_) {
         while (len > 0) {
             size_t xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;

             ret = AdbReadEndpointSync(handle_->adb_read_pipe, data, xfer, &read, time_out);
             errno = GetLastError();
             DBG("usb_read got: %lu, expected: %zu, errno: %d\n", read, xfer, errno);
             if (ret == 0) {
                 // assume ERROR_INVALID_HANDLE indicates we are disconnected
                 if (errno == ERROR_INVALID_HANDLE)
                     usb_kick(handle_.get());
                 break;
             }
             count += read;
             len -= read;
             data = (char*)data + read;

             if (xfer != read || len == 0) return count;
         }
     } else {
         DBG("usb_read NULL handle\n");
         SetLastError(ERROR_INVALID_HANDLE);
     }

     DBG("usb_read failed: %d\n", errno);

     return -1;
 }

 void usb_cleanup_handle(usb_handle* handle) {
     if (NULL != handle) {
         if (NULL != handle->adb_write_pipe)
             AdbCloseHandle(handle->adb_write_pipe);
         if (NULL != handle->adb_read_pipe)
             AdbCloseHandle(handle->adb_read_pipe);
         if (NULL != handle->adb_interface)
             AdbCloseHandle(handle->adb_interface);

         handle->interface_name.clear();
         handle->adb_write_pipe = NULL;
         handle->adb_read_pipe = NULL;
         handle->adb_interface = NULL;
     }
 }

 void usb_kick(usb_handle* handle) {
     if (NULL != handle) {
         usb_cleanup_handle(handle);
     } else {
         SetLastError(ERROR_INVALID_HANDLE);
         errno = ERROR_INVALID_HANDLE;
     }
 }

 WindowsUsbTransport::~WindowsUsbTransport() {
     Close();
 }

 int WindowsUsbTransport::Close() {
     DBG("usb_close\n");

     if (nullptr != handle_) {
         // Cleanup handle
         usb_cleanup_handle(handle_.get());
         handle_.reset();
     }

     return 0;
 }

 int WindowsUsbTransport::Reset() {
     DBG("usb_reset currently unsupported\n\n");
     // TODO, this is a bit complicated since it is using ADB
     return -1;
 }

 int recognized_device(usb_handle* handle, ifc_match_func callback) {
     struct usb_ifc_info info;
     USB_DEVICE_DESCRIPTOR device_desc;
     USB_INTERFACE_DESCRIPTOR interf_desc;

     if (NULL == handle)
         return 0;

     // Check vendor and product id first
     if (!AdbGetUsbDeviceDescriptor(handle->adb_interface, &device_desc)) {
         DBG("skipping device %x:%x\n", device_desc.idVendor, device_desc.idProduct);
         return 0;
     }

     // Then check interface properties
     if (!AdbGetUsbInterfaceDescriptor(handle->adb_interface, &interf_desc)) {
         DBG("skipping device %x:%x, failed to find interface\n", device_desc.idVendor,
             device_desc.idProduct);
         return 0;
     }

     // Must have two endpoints
     if (2 != interf_desc.bNumEndpoints) {
         DBG("skipping device %x:%x, incorrect number of endpoints\n", device_desc.idVendor,
             device_desc.idProduct);
         return 0;
     }

     info.dev_vendor = device_desc.idVendor;
     info.dev_product = device_desc.idProduct;
     info.dev_class = device_desc.bDeviceClass;
     info.dev_subclass = device_desc.bDeviceSubClass;
     info.dev_protocol = device_desc.bDeviceProtocol;
     info.ifc_class = interf_desc.bInterfaceClass;
     info.ifc_subclass = interf_desc.bInterfaceSubClass;
     info.ifc_protocol = interf_desc.bInterfaceProtocol;
     info.writable = 1;

     // read serial number (if there is one)
     unsigned long serial_number_len = sizeof(info.serial_number);
     if (!AdbGetSerialNumber(handle->adb_interface, info.serial_number,
                     &serial_number_len, true)) {
         info.serial_number[0] = 0;
     }
     info.interface[0] = 0;

     info.device_path[0] = 0;

     if (callback(&info) == 0) {
         DBG("skipping device %x:%x, not selected by callback\n", device_desc.idVendor,
             device_desc.idProduct);
         return 1;
     }

     DBG("found device %x:%x (%s)\n", device_desc.idVendor, device_desc.idProduct,
         info.serial_number);
     return 0;
 }

 static std::unique_ptr<usb_handle> find_usb_device(ifc_match_func callback) {
     std::unique_ptr<usb_handle> handle;
     char entry_buffer[2048];
     char interf_name[2048];
     AdbInterfaceInfo* next_interface = (AdbInterfaceInfo*)(&entry_buffer[0]);
     unsigned long entry_buffer_size = sizeof(entry_buffer);
     char* copy_name;

     // Enumerate all present and active interfaces.
     ADBAPIHANDLE enum_handle =
         AdbEnumInterfaces(usb_class_id, true, true, true);

     if (NULL == enum_handle)
         return NULL;

     while (AdbNextInterface(enum_handle, next_interface, &entry_buffer_size)) {
         // TODO(vchtchetkine): FIXME - temp hack converting wchar_t into char.
         // It would be better to change AdbNextInterface so it will return
         // interface name as single char string.
         const wchar_t* wchar_name = next_interface->device_name;
         for(copy_name = interf_name;
                 L'\0' != *wchar_name;
                 wchar_name++, copy_name++) {
             *copy_name = (char)(*wchar_name);
         }
         *copy_name = '\0';

         DBG("attempting to open interface %S\n", next_interface->device_name);
         handle = do_usb_open(next_interface->device_name);
         if (NULL != handle) {
             // Lets see if this interface (device) belongs to us
             if (recognized_device(handle.get(), callback)) {
                 // found it!
                 break;
             } else {
                 usb_cleanup_handle(handle.get());
                 handle.reset();
             }
         }

         entry_buffer_size = sizeof(entry_buffer);
     }

     AdbCloseHandle(enum_handle);
     return handle;
 }

 UsbTransport* usb_open(ifc_match_func callback, uint32_t) {
     std::unique_ptr<usb_handle> handle = find_usb_device(callback);
     return handle ? new WindowsUsbTransport(std::move(handle)) : nullptr;
 }
	/*
	* Copyright (C) 2008 The Android Open Source Project
	* 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.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "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
	* COPYRIGHT OWNER OR CONTRIBUTORS 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.
	*/

	#include <windows.h>
	#include <winerror.h>
	#include <errno.h>
	#include <usb100.h>
	#include <adb_api.h>
	#include <stdio.h>
	#include <stdlib.h>

	#include <memory>
	#include <string>

	#include "usb.h"

	//#define TRACE_USB 1
	#if TRACE_USB
	#define DBG(x...) fprintf(stderr, x)
	#else
	#define DBG(x...)
	#endif

	#define MAX_USBFS_BULK_SIZE (1024 * 1024)

	/** Structure usb_handle describes our connection to the usb device via
	AdbWinApi.dll. This structure is returned from usb_open() routine and
	is expected in each subsequent call that is accessing the device.
	*/
	struct usb_handle {
	/// Handle to USB interface
	ADBAPIHANDLE adb_interface;

	/// Handle to USB read pipe (endpoint)
	ADBAPIHANDLE adb_read_pipe;

	/// Handle to USB write pipe (endpoint)
	ADBAPIHANDLE adb_write_pipe;

	/// Interface name
	std::string interface_name;
	};

	class WindowsUsbTransport : public UsbTransport {
	public:
	WindowsUsbTransport(std::unique_ptr<usb_handle> handle) : handle_(std::move(handle)) {}
	~WindowsUsbTransport() override;

	ssize_t Read(void* data, size_t len) override;
	ssize_t Write(const void* data, size_t len) override;
	int Close() override;
	int Reset() override;

	private:
	std::unique_ptr<usb_handle> handle_;

	DISALLOW_COPY_AND_ASSIGN(WindowsUsbTransport);
	};

	/// Class ID assigned to the device by androidusb.sys
	static const GUID usb_class_id = ANDROID_USB_CLASS_ID;

	/// Checks if interface (device) matches certain criteria
	int recognized_device(usb_handle* handle, ifc_match_func callback);

	/// Opens usb interface (device) by interface (device) name.
	std::unique_ptr<usb_handle> do_usb_open(const wchar_t* interface_name);

	/// Cleans up opened usb handle
	void usb_cleanup_handle(usb_handle* handle);

	/// Cleans up (but don't close) opened usb handle
	void usb_kick(usb_handle* handle);


	std::unique_ptr<usb_handle> do_usb_open(const wchar_t* interface_name) {
	// Allocate our handle
	std::unique_ptr<usb_handle> ret(new usb_handle);

	// Create interface.
	ret->adb_interface = AdbCreateInterfaceByName(interface_name);

	if (nullptr == ret->adb_interface) {
	errno = GetLastError();
	DBG("failed to open interface %S\n", interface_name);
	return nullptr;
	}

	// Open read pipe (endpoint)
	ret->adb_read_pipe =
	AdbOpenDefaultBulkReadEndpoint(ret->adb_interface,
	AdbOpenAccessTypeReadWrite,
	AdbOpenSharingModeReadWrite);
	if (nullptr != ret->adb_read_pipe) {
	// Open write pipe (endpoint)
	ret->adb_write_pipe =
	AdbOpenDefaultBulkWriteEndpoint(ret->adb_interface,
	AdbOpenAccessTypeReadWrite,
	AdbOpenSharingModeReadWrite);
	if (nullptr != ret->adb_write_pipe) {
	// Save interface name
	unsigned long name_len = 0;

	// First get expected name length
	AdbGetInterfaceName(ret->adb_interface,
	nullptr,
	&name_len,
	true);
	if (0 != name_len) {
	// Now save the name
	ret->interface_name.resize(name_len);
	if (AdbGetInterfaceName(ret->adb_interface,
	&ret->interface_name[0],
	&name_len,
	true)) {
	// We're done at this point
	return ret;
	}
	}
	}
	}

	// Something went wrong.
	errno = GetLastError();
	usb_cleanup_handle(ret.get());
	SetLastError(errno);

	return nullptr;
	}

	ssize_t WindowsUsbTransport::Write(const void* data, size_t len) {
	unsigned long time_out = 5000;
	unsigned long written = 0;
	unsigned count = 0;
	int ret;

	DBG("usb_write %zu\n", len);
	if (nullptr != handle_) {
	// Perform write
	while(len > 0) {
	int xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
	ret = AdbWriteEndpointSync(handle_->adb_write_pipe, const_cast<void*>(data), xfer,
	&written, time_out);
	errno = GetLastError();
	DBG("AdbWriteEndpointSync returned %d, errno: %d\n", ret, errno);
	if (ret == 0) {
	// assume ERROR_INVALID_HANDLE indicates we are disconnected
	if (errno == ERROR_INVALID_HANDLE)
	usb_kick(handle_.get());
	return -1;
	}

	count += written;
	len -= written;
	data = (const char *)data + written;

	if (len == 0)
	return count;
	}
	} else {
	DBG("usb_write NULL handle\n");
	SetLastError(ERROR_INVALID_HANDLE);
	}

	DBG("usb_write failed: %d\n", errno);

	return -1;
	}

	ssize_t WindowsUsbTransport::Read(void* data, size_t len) {
	unsigned long time_out = 0;
	unsigned long read = 0;
	size_t count = 0;
	int ret;

	DBG("usb_read %zu\n", len);
	if (nullptr != handle_) {
	while (len > 0) {
	size_t xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;

	ret = AdbReadEndpointSync(handle_->adb_read_pipe, data, xfer, &read, time_out);
	errno = GetLastError();
	DBG("usb_read got: %lu, expected: %zu, errno: %d\n", read, xfer, errno);
	if (ret == 0) {
	// assume ERROR_INVALID_HANDLE indicates we are disconnected
	if (errno == ERROR_INVALID_HANDLE)
	usb_kick(handle_.get());
	break;
	}
	count += read;
	len -= read;
	data = (char*)data + read;

	if (xfer != read \|\| len == 0) return count;
	}
	} else {
	DBG("usb_read NULL handle\n");
	SetLastError(ERROR_INVALID_HANDLE);
	}

	DBG("usb_read failed: %d\n", errno);

	return -1;
	}

	void usb_cleanup_handle(usb_handle* handle) {
	if (NULL != handle) {
	if (NULL != handle->adb_write_pipe)
	AdbCloseHandle(handle->adb_write_pipe);
	if (NULL != handle->adb_read_pipe)
	AdbCloseHandle(handle->adb_read_pipe);
	if (NULL != handle->adb_interface)
	AdbCloseHandle(handle->adb_interface);

	handle->interface_name.clear();
	handle->adb_write_pipe = NULL;
	handle->adb_read_pipe = NULL;
	handle->adb_interface = NULL;
	}
	}

	void usb_kick(usb_handle* handle) {
	if (NULL != handle) {
	usb_cleanup_handle(handle);
	} else {
	SetLastError(ERROR_INVALID_HANDLE);
	errno = ERROR_INVALID_HANDLE;
	}
	}

	WindowsUsbTransport::~WindowsUsbTransport() {
	Close();
	}

	int WindowsUsbTransport::Close() {
	DBG("usb_close\n");

	if (nullptr != handle_) {
	// Cleanup handle
	usb_cleanup_handle(handle_.get());
	handle_.reset();
	}

	return 0;
	}

	int WindowsUsbTransport::Reset() {
	DBG("usb_reset currently unsupported\n\n");
	// TODO, this is a bit complicated since it is using ADB
	return -1;
	}

	int recognized_device(usb_handle* handle, ifc_match_func callback) {
	struct usb_ifc_info info;
	USB_DEVICE_DESCRIPTOR device_desc;
	USB_INTERFACE_DESCRIPTOR interf_desc;

	if (NULL == handle)
	return 0;

	// Check vendor and product id first
	if (!AdbGetUsbDeviceDescriptor(handle->adb_interface, &device_desc)) {
	DBG("skipping device %x:%x\n", device_desc.idVendor, device_desc.idProduct);
	return 0;
	}

	// Then check interface properties
	if (!AdbGetUsbInterfaceDescriptor(handle->adb_interface, &interf_desc)) {
	DBG("skipping device %x:%x, failed to find interface\n", device_desc.idVendor,
	device_desc.idProduct);
	return 0;
	}

	// Must have two endpoints
	if (2 != interf_desc.bNumEndpoints) {
	DBG("skipping device %x:%x, incorrect number of endpoints\n", device_desc.idVendor,
	device_desc.idProduct);
	return 0;
	}

	info.dev_vendor = device_desc.idVendor;
	info.dev_product = device_desc.idProduct;
	info.dev_class = device_desc.bDeviceClass;
	info.dev_subclass = device_desc.bDeviceSubClass;
	info.dev_protocol = device_desc.bDeviceProtocol;
	info.ifc_class = interf_desc.bInterfaceClass;
	info.ifc_subclass = interf_desc.bInterfaceSubClass;
	info.ifc_protocol = interf_desc.bInterfaceProtocol;
	info.writable = 1;

	// read serial number (if there is one)
	unsigned long serial_number_len = sizeof(info.serial_number);
	if (!AdbGetSerialNumber(handle->adb_interface, info.serial_number,
	&serial_number_len, true)) {
	info.serial_number[0] = 0;
	}
	info.interface[0] = 0;

	info.device_path[0] = 0;

	if (callback(&info) == 0) {
	DBG("skipping device %x:%x, not selected by callback\n", device_desc.idVendor,
	device_desc.idProduct);
	return 1;
	}

	DBG("found device %x:%x (%s)\n", device_desc.idVendor, device_desc.idProduct,
	info.serial_number);
	return 0;
	}

	static std::unique_ptr<usb_handle> find_usb_device(ifc_match_func callback) {
	std::unique_ptr<usb_handle> handle;
	char entry_buffer[2048];
	char interf_name[2048];
	AdbInterfaceInfo* next_interface = (AdbInterfaceInfo*)(&entry_buffer[0]);
	unsigned long entry_buffer_size = sizeof(entry_buffer);
	char* copy_name;

	// Enumerate all present and active interfaces.
	ADBAPIHANDLE enum_handle =
	AdbEnumInterfaces(usb_class_id, true, true, true);

	if (NULL == enum_handle)
	return NULL;

	while (AdbNextInterface(enum_handle, next_interface, &entry_buffer_size)) {
	// TODO(vchtchetkine): FIXME - temp hack converting wchar_t into char.
	// It would be better to change AdbNextInterface so it will return
	// interface name as single char string.
	const wchar_t* wchar_name = next_interface->device_name;
	for(copy_name = interf_name;
	L'\0' != *wchar_name;
	wchar_name++, copy_name++) {
	copy_name = (char)(wchar_name);
	}
	*copy_name = '\0';

	DBG("attempting to open interface %S\n", next_interface->device_name);
	handle = do_usb_open(next_interface->device_name);
	if (NULL != handle) {
	// Lets see if this interface (device) belongs to us
	if (recognized_device(handle.get(), callback)) {
	// found it!
	break;
	} else {
	usb_cleanup_handle(handle.get());
	handle.reset();
	}
	}

	entry_buffer_size = sizeof(entry_buffer);
	}

	AdbCloseHandle(enum_handle);
	return handle;
	}

	UsbTransport* usb_open(ifc_match_func callback, uint32_t) {
	std::unique_ptr<usb_handle> handle = find_usb_device(callback);
	return handle ? new WindowsUsbTransport(std::move(handle)) : nullptr;
	}