USBIP虚拟控制器和根集线器HUB的设备信息分析

USBIP是一套可以实现USB远程设备的本机映射，这样就像在本地操作目标USB设备一样。其原理是在本地端通过安装一个虚拟的USB根控制器，根集线器，同时虚拟出4个USB端口，当远程USB设备连接到远程机器时，可以把远程设备的USB信息通过网络传输到本地，在本地的虚拟USB端口虚拟一个相同的设备，这样本地机器在操作这个虚拟的设备时，通过网络就像操作远程设备一样。这个功能相当于一个网络硬盘一样，只是这玩意用于USB设备。

USBIP代码开源，本人拿到的这一套代码比较老，不过还好支持X64系统，在Win10上安装有一点小问题，本人经过排查并修改了这个BUG.但这并不妨碍本人这一套代码的敬佩。

USBIP的工程目录

USBIP的工程目录如下图所示，有设备端的，有主机端的，有关于网络通讯端，也有公共的代码。本人现在并未完全研究，所以也暂时说不上来这些代码的功能，但并不妨碍我们对这些代码有一个认识.

USBIP编译后的

USBIP整个工程编译完成后如下图：

除过本人调试要用的intall.bat和Devcon.exe,剩下的都是编译后的文件。

USBIP的安装

在主机端即需要虚拟USB设备端，是需要先安装虚拟USB控制器和虚拟USB集线器的。不过实际我们只需要安装根控制器，而根集线器会自动安装。

USBIP使用如下命令安装：

usbip.exe install -w

usbip.exe对应的工程为usbip,而且该工程引用了usbip_common编译后的lib文件。

而本人通过devcon也可以使用如下方式安装：

CD /d %~dp0
devcon.exe install usbip_root.inf "USBIPWIN\root"

执行完成以上命令后，就可以看到USBIP虚拟控制器和根集线器的驱动安装完成。
我们在设备管理器中可以看到如下：

我们对设备树进行整理：

我们也可以通过USBTreeview来看到设备树，其中VHCI-USB控制器的信息如下图：

    ===================== USB Host Controller =======================

        +++++++++++++++++ Device Information ++++++++++++++++++
Device Description       : usbip-win VHCI
Device Path 1            : \\?\USBIPWIN#vhci#1&79f5d87&58#{3abf6f2d-71c4-462a-8a92-1e6861e6af27} (GUID_DEVINTERFACE_USB_HOST_CONTROLLER)
Device Path 2            : \\?\USBIPWIN#vhci#1&79f5d87&58#{d35f7840-6a0c-11d2-b841-00c04fad5171}
Kernel Name              : \Device\0000007c
Device ID                : USBIPWIN\VHCI\1&79F5D87&58
Hardware IDs             : USBIPWIN\vhci
Driver KeyName           : {36fc9e60-c465-11cf-8056-444553540000}\0116 (GUID_DEVCLASS_USB)
Driver                   : \SystemRoot\System32\drivers\usbip_vhci.sys (Version:   Date: 2021-04-14)
Driver Inf               : C:\Windows\inf\oem115.inf
Legacy BusType           : PNPBus
Class                    : USB
Class GUID               : {36fc9e60-c465-11cf-8056-444553540000} (GUID_DEVCLASS_USB)
Service                  : usbip_vhci
Enumerator               : USBIPWIN
Location Info            : Root
Manufacturer Info        : usbip-win
Capabilities             : 0x00 (-)
Status                   : 0x0180200A (DN_DRIVER_LOADED, DN_STARTED, DN_DISABLEABLE, DN_NT_ENUMERATOR, DN_NT_DRIVER)
Problem Code             : 0
Address                  : 1
HcDisableSelectiveSuspend: 0
EnableSelectiveSuspend   : 0
SelectiveSuspendEnabled  : 0
EnhancedPowerMgmtEnabled : 0
IdleInWorkingState       : 0
WakeFromSleepState       : 0
Power State              : D0 (supported: D0, D3)
 Child Device 1          : usbip-win VHUB
  Device Path            : \\?\USB#ROOT_HUB#2&31d71e8d&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8} (GUID_DEVINTERFACE_USB_HUB)
  Kernel Name            : \Device\0000007d
  Device ID              : USB\ROOT_HUB\2&31D71E8D&0
  Class                  : USB
  Driver KeyName         : {36fc9e60-c465-11cf-8056-444553540000}\0117 (GUID_DEVCLASS_USB)
  Service                : usbip_vhci

        --------------- USB Hostcontroller Info0 --------------
PciVendorId              : 0x0000
PciDeviceId              : 0x0000
PciRevision              : 0x00
NumberOfRootPorts        : 0x01 (1 Ports)
ControllerFlavor         : 0x3E8 (1000 = EHCI_Generic)
HcFeatureFlags           : 0x00
 Port Power Switching    : no
 Selective Suspend       : no
 Legacy BIOS             : no

Roothub Symbolic Link    : USB#ROOT_HUB#2&31d71e8d&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8}

BusStatistics Error      : ERROR_INVALID_FUNCTION

DriverVersion Error      : ERROR_INVALID_FUNCTION

BandwidthInfo Error      : ERROR_INVALID_FUNCTION

        -------- USB Hostcontroller Power States Info ---------
SystemState              : S0    S1    S2    S3    S4    S5    
HcDevicePowerState       : D0    --    --    --    D3    --    
HcDeviceWake             : --    --    --    --    --    --    
HcSystemWake             : --    --    --    --    --    --    
RhDevicePowerState       : --    D3    D3    D3    D3    --    
RhDeviceWake             : D2    D2    D2    D2    D2    D2    
RhSystemWake             : S0    S0    S0    S0    S0    S0    
LastSystemSleepState     : --    --    --    --    --    --    
CanWakeup                : no    no    no    no    no    no    
IsPowered                : no    no    no    no    no    no

根集线器HUB的信息如下图：

    ========================= USB Root Hub =========================
Sum of Hubs and Devices  : 0
Sum of Endpoints         : 0

        +++++++++++++++++ Device Information ++++++++++++++++++
Device Description       : usbip-win VHUB
Device Path              : \\?\USB#ROOT_HUB#2&31d71e8d&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8} (GUID_DEVINTERFACE_USB_HUB)
Kernel Name              : \Device\0000007d
Device ID                : USB\ROOT_HUB\2&31D71E8D&0
Hardware IDs             : USB\VID_1209&PID_8250&REV_0000
Driver KeyName           : {36fc9e60-c465-11cf-8056-444553540000}\0117 (GUID_DEVCLASS_USB)
Driver                   : \SystemRoot\System32\drivers\usbip_vhci.sys (Version:   Date: 2021-04-14)
Driver Inf               : C:\Windows\inf\oem115.inf
Legacy BusType           : PNPBus
Class                    : USB
Class GUID               : {36fc9e60-c465-11cf-8056-444553540000} (GUID_DEVCLASS_USB)
Service                  : usbip_vhci
Enumerator               : USB
Location Info            : VHCI
Manufacturer Info        : usbip-win
Capabilities             : 0x00 (-)
Status                   : 0x0180200A (DN_DRIVER_LOADED, DN_STARTED, DN_DISABLEABLE, DN_NT_ENUMERATOR, DN_NT_DRIVER)
Problem Code             : 0
Address                  : 1
HcDisableSelectiveSuspend: 0
EnableSelectiveSuspend   : 0
SelectiveSuspendEnabled  : 0
EnhancedPowerMgmtEnabled : 0
IdleInWorkingState       : 0
WakeFromSleepState       : 0
Power State              : D0 (supported: D0, D3)

        ------------------- USB Hub Descriptor -----------------
bDescriptorLength        : 0x09 (9 bytes)
bDescriptorType          : 0x29 (Hub Descriptor)
bNumberOfPorts           : 0x06 (6 Ports)
wHubCharacteristics      : 0x0000
 Power switching         : Ganged
 Compound device         : No
 Over-current protection : Global
 TT Think Time           : At most 8 FS bit times
 Port Indicators         : Not supported
bPowerOnToPowerGood      : 0x01 (2 ms)
bHubControlCurrent       : 0x01 (1 mA)
DeviceRemovable          : 0x00
 Bit 0                   : 0 (reserved, any value)
 Bit 1                   : 0 (Device at Port 1 is removable)
 Bit 2                   : 0 (Device at Port 2 is removable)
 Bit 3                   : 0 (Device at Port 3 is removable)
 Bit 4                   : 0 (Device at Port 4 is removable)
 Bit 5                   : 0 (Device at Port 5 is removable)
 Bit 6                   : 0 (Device at Port 6 is removable)
 Bit 7                   : 0 (unused, must be 0)
PowerControlMask         : 0x00
Data (HexDump)           : 09 29 06 00 00 01 01 00 00                        .).......
HubIsBusPowered          : 0x00 (Self Powered)

        -------------- Extended USB Hub Descriptor -------------
HubType                  : USB Root Hub
HighestPortNumber        : 6

        ------------------- USB Hub Descriptor -----------------
bDescriptorLength        : 0x09 (9 bytes)
bDescriptorType          : 0x29 (Hub Descriptor)
bNumberOfPorts           : 0x06 (6 Ports)
wHubCharacteristics      : 0x0000
 Power switching         : Ganged
 Compound device         : No
 Over-current protection : Global
 TT Think Time           : At most 8 FS bit times
 Port Indicators         : Not supported
bPowerOnToPowerGood      : 0x01 (2 ms)
bHubControlCurrent       : 0x01 (1 mA)
DeviceRemovable          : 0x00
 Bit 0                   : 0 (reserved, any value)
 Bit 1                   : 0 (Device at Port 1 is removable)
 Bit 2                   : 0 (Device at Port 2 is removable)
 Bit 3                   : 0 (Device at Port 3 is removable)
 Bit 4                   : 0 (Device at Port 4 is removable)
 Bit 5                   : 0 (Device at Port 5 is removable)
 Bit 6                   : 0 (Device at Port 6 is removable)
 Bit 7                   : 0 (unused, must be 0)
PowerControlMask         : 0x00
Data (HexDump)           : 09 29 06 00 00 01 01 00 00                        .).......

        ----------------- USB Hub Capabilities ----------------
HighSpeedCapable         : No
HighSpeed                : No
MultiTtCapable           : Yes
HubIsMultiTt             : Yes
ArmedWakeOnConnect       : Yes
IsBusPowered             : No
IsRoot                   : Yes
Data (HexDump)           : BC FF FF FF                                       ....