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enum.cpp
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enum.cpp
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/*++
Copyright (c) 1997-2011 Microsoft Corporation
Module Name:
ENUM.C
Abstract:
This source file contains the routines which enumerate the USB bus
and populate the TreeView control.
The enumeration process goes like this:
(1) Enumerate Host Controllers and Root Hubs
EnumerateHostControllers()
EnumerateHostController()
Host controllers currently have symbolic link names of the form HCDx,
where x starts at 0. Use CreateFile() to open each host controller
symbolic link. Create a node in the TreeView to represent each host
controller.
GetRootHubName()
After a host controller has been opened, send the host controller an
IOCTL_USB_GET_ROOT_HUB_NAME request to get the symbolic link name of
the root hub that is part of the host controller.
(2) Enumerate Hubs (Root Hubs and External Hubs)
EnumerateHub()
Given the name of a hub, use CreateFile() to map the hub. Send the
hub an IOCTL_USB_GET_NODE_INFORMATION request to get info about the
hub, such as the number of downstream ports. Create a node in the
TreeView to represent each hub.
(3) Enumerate Downstream Ports
EnumerateHubPorts()
Given an handle to an open hub and the number of downstream ports on
the hub, send the hub an IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX
request for each downstream port of the hub to get info about the
device (if any) attached to each port. If there is a device attached
to a port, send the hub an IOCTL_USB_GET_NODE_CONNECTION_NAME request
to get the symbolic link name of the hub attached to the downstream
port. If there is a hub attached to the downstream port, recurse to
step (2).
GetAllStringDescriptors()
GetConfigDescriptor()
Create a node in the TreeView to represent each hub port
and attached device.
Environment:
user mode
Revision History:
04-25-97 : created
--*/
//*****************************************************************************
// I N C L U D E S
//*****************************************************************************
#include "uvcview.h"
#include "utils.hpp"
//*****************************************************************************
// D E F I N E S
//*****************************************************************************
#define NUM_STRING_DESC_TO_GET 32
//*****************************************************************************
// L O C A L F U N C T I O N P R O T O T Y P E S
//*****************************************************************************
std::vector<PUSBHOSTCONTROLLERINFO>
EnumerateHostControllers (
HTREEITEM hTreeParent,
ULONG *DevicesConnected
);
PUSBHOSTCONTROLLERINFO
EnumerateHostController (
HTREEITEM hTreeParent,
HANDLE hHCDev,
_Inout_ PWCHAR leafName,
_In_ HANDLE deviceInfo,
_In_ PSP_DEVINFO_DATA deviceInfoData
);
PUSBROOTHUBINFO
EnumerateHub (
HTREEITEM hTreeParent,
_In_reads_(cbHubName) PWCHAR HubName,
_In_ size_t cbHubName,
_In_opt_ PUSB_NODE_CONNECTION_INFORMATION_EX ConnectionInfo,
_In_opt_ PUSB_NODE_CONNECTION_INFORMATION_EX_V2 ConnectionInfoV2,
_In_opt_ PUSB_PORT_CONNECTOR_PROPERTIES PortConnectorProps,
_In_opt_ PUSB_DESCRIPTOR_REQUEST ConfigDesc,
_In_opt_ PUSB_DESCRIPTOR_REQUEST BosDesc,
_In_opt_ PSTRING_DESCRIPTOR_NODE StringDescs,
_In_opt_ PUSB_DEVICE_PNP_STRINGS DevProps
);
std::vector<PUSBDEVICEINFO>
EnumerateHubPorts (
HTREEITEM hTreeParent,
HANDLE hHubDevice,
ULONG NumPorts
);
PWCHAR GetRootHubName (
HANDLE HostController
);
PWCHAR GetExternalHubName (
HANDLE Hub,
ULONG ConnectionIndex
);
PWCHAR GetHCDDriverKeyName (
HANDLE HCD
);
PWCHAR GetDriverKeyName (
HANDLE Hub,
ULONG ConnectionIndex
);
PUSB_DESCRIPTOR_REQUEST
GetConfigDescriptor (
HANDLE hHubDevice,
ULONG ConnectionIndex,
UCHAR DescriptorIndex
);
PUSB_DESCRIPTOR_REQUEST
GetBOSDescriptor (
HANDLE hHubDevice,
ULONG ConnectionIndex
);
DWORD
GetHostControllerPowerMap(
HANDLE hHCDev,
PUSBHOSTCONTROLLERINFO hcInfo);
DWORD
GetHostControllerInfo(
HANDLE hHCDev,
PUSBHOSTCONTROLLERINFO hcInfo);
PCHAR WideStrToMultiStr (
_In_reads_bytes_(cbWideStr) PWCHAR WideStr,
_In_ size_t cbWideStr
);
BOOL
AreThereStringDescriptors (
PUSB_DEVICE_DESCRIPTOR DeviceDesc,
PUSB_CONFIGURATION_DESCRIPTOR ConfigDesc
);
PSTRING_DESCRIPTOR_NODE
GetAllStringDescriptors (
HANDLE hHubDevice,
ULONG ConnectionIndex,
PUSB_DEVICE_DESCRIPTOR DeviceDesc,
PUSB_CONFIGURATION_DESCRIPTOR ConfigDesc
);
PSTRING_DESCRIPTOR_NODE
GetStringDescriptor (
HANDLE hHubDevice,
ULONG ConnectionIndex,
UCHAR DescriptorIndex,
USHORT LanguageID
);
HRESULT
GetStringDescriptors (
_In_ HANDLE hHubDevice,
_In_ ULONG ConnectionIndex,
_In_ UCHAR DescriptorIndex,
_In_ ULONG NumLanguageIDs,
_In_reads_(NumLanguageIDs) USHORT *LanguageIDs,
_In_ PSTRING_DESCRIPTOR_NODE StringDescNodeHead
);
void
EnumerateAllDevices();
void
EnumerateAllDevicesWithGuid(
PDEVICE_GUID_LIST DeviceList,
LPGUID Guid
);
void
FreeDeviceInfoNode(
_In_ PDEVICE_INFO_NODE *ppNode
);
PDEVICE_INFO_NODE
FindMatchingDeviceNodeForDriverName(
_In_ PWSTR DriverKeyName,
_In_ BOOLEAN IsHub
);
//*****************************************************************************
// G L O B A L S
//*****************************************************************************
// List of enumerated host controllers.
//
std::vector<PUSBHOSTCONTROLLERINFO> EnumeratedHCList;
DEVICE_GUID_LIST gHubList;
DEVICE_GUID_LIST gDeviceList;
//*****************************************************************************
// G L O B A L S P R I V A T E T O T H I S F I L E
//*****************************************************************************
ULONG TotalDevicesConnected;
//*****************************************************************************
//
// EnumerateHostControllers()
//
// hTreeParent - Handle of the TreeView item under which host controllers
// should be added.
//
//*****************************************************************************
std::vector<PUSBHOSTCONTROLLERINFO>
EnumerateHostControllers (
HTREEITEM hTreeParent,
ULONG *DevicesConnected
)
{
HANDLE hHCDev = NULL;
HDEVINFO deviceInfo = NULL;
SP_DEVINFO_DATA deviceInfoData;
SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
PSP_DEVICE_INTERFACE_DETAIL_DATA deviceDetailData = NULL;
ULONG index = 0;
ULONG requiredLength = 0;
BOOL success;
std::vector<PUSBHOSTCONTROLLERINFO> hostControllers;
TotalDevicesConnected = 0;
TotalHubs = 0;
EnumerateAllDevices();
// Iterate over host controllers using the new GUID based interface
//
deviceInfo = SetupDiGetClassDevs((LPGUID)&GUID_CLASS_USB_HOST_CONTROLLER,
NULL,
NULL,
(DIGCF_PRESENT | DIGCF_DEVICEINTERFACE));
deviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (index=0;
SetupDiEnumDeviceInfo(deviceInfo,
index,
&deviceInfoData);
index++)
{
deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
success = SetupDiEnumDeviceInterfaces(deviceInfo,
0,
(LPGUID)&GUID_CLASS_USB_HOST_CONTROLLER,
index,
&deviceInterfaceData);
if (!success)
{
OOPS();
break;
}
success = SetupDiGetDeviceInterfaceDetail(deviceInfo,
&deviceInterfaceData,
NULL,
0,
&requiredLength,
NULL);
if (!success && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
{
OOPS();
break;
}
deviceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)ALLOC(requiredLength);
if (deviceDetailData == NULL)
{
OOPS();
break;
}
deviceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
success = SetupDiGetDeviceInterfaceDetail(deviceInfo,
&deviceInterfaceData,
deviceDetailData,
requiredLength,
&requiredLength,
NULL);
if (!success)
{
OOPS();
break;
}
hHCDev = CreateFile(deviceDetailData->DevicePath,
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
// If the handle is valid, then we've successfully opened a Host
// Controller. Display some info about the Host Controller itself,
// then enumerate the Root Hub attached to the Host Controller.
//
if (hHCDev != INVALID_HANDLE_VALUE)
{
PUSBHOSTCONTROLLERINFO info = EnumerateHostController(hTreeParent,
hHCDev,
deviceDetailData->DevicePath,
deviceInfo,
&deviceInfoData);
if (info) {
hostControllers.push_back(info);
}
CloseHandle(hHCDev);
}
FREE(deviceDetailData);
}
SetupDiDestroyDeviceInfoList(deviceInfo);
*DevicesConnected = TotalDevicesConnected;
return hostControllers;
}
//*****************************************************************************
//
// EnumerateHostController()
//
// hTreeParent - Handle of the TreeView item under which host controllers
// should be added.
//
//*****************************************************************************
PUSBHOSTCONTROLLERINFO
EnumerateHostController (
HTREEITEM hTreeParent,
HANDLE hHCDev, _Inout_ PWCHAR leafName,
_In_ HANDLE deviceInfo,
_In_ PSP_DEVINFO_DATA deviceInfoData
)
{
PWCHAR driverKeyName = NULL;
HTREEITEM hHCItem = NULL;
PWCHAR rootHubName = NULL;
PUSBHOSTCONTROLLERINFO hcInfo = NULL;
DWORD dwSuccess;
BOOL success = FALSE;
ULONG deviceAndFunction = 0;
PUSB_DEVICE_PNP_STRINGS DevProps = NULL;
// Allocate a structure to hold information about this host controller.
//
hcInfo = (PUSBHOSTCONTROLLERINFO)ALLOC(sizeof(USBHOSTCONTROLLERINFO));
// just return if could not alloc memory
if (NULL == hcInfo)
return NULL;
hcInfo->DeviceInfoType = HostControllerInfo;
// Obtain the driver key name for this host controller.
//
driverKeyName = GetHCDDriverKeyName(hHCDev);
if (NULL == driverKeyName)
{
// Failure obtaining driver key name.
OOPS();
FREE(hcInfo);
return NULL;
}
// Don't enumerate this host controller again if it already
// on the list of enumerated host controllers.
//
for (PUSBHOSTCONTROLLERINFO hcInfoInList : EnumeratedHCList)
{
if (wcscmp(driverKeyName, hcInfoInList->DriverKey) == 0)
{
// Already on the list, exit
//
FREE(driverKeyName);
FREE(hcInfo);
return NULL;
}
}
// Obtain host controller device properties
{
size_t cbDriverName = 0;
HRESULT hr = S_OK;
hr = StringCbLength(driverKeyName, MAX_DRIVER_KEY_NAME, &cbDriverName);
if (SUCCEEDED(hr))
{
DevProps = DriverNameToDeviceProperties(driverKeyName, cbDriverName);
}
}
hcInfo->DriverKey = driverKeyName;
if (DevProps)
{
ULONG ven, dev, subsys, rev;
ven = dev = subsys = rev = 0;
if (swscanf_s(DevProps->DeviceId,
L"PCI\\VEN_%x&DEV_%x&SUBSYS_%x&REV_%x",
&ven, &dev, &subsys, &rev) != 4)
{
OOPS();
}
hcInfo->VendorID = ven;
hcInfo->DeviceID = dev;
hcInfo->SubSysID = subsys;
hcInfo->Revision = rev;
hcInfo->UsbDeviceProperties = DevProps;
}
else
{
OOPS();
}
if (DevProps != NULL && DevProps->DeviceDesc != NULL)
{
leafName = DevProps->DeviceDesc;
}
else
{
OOPS();
}
#ifdef SERIALIZE_VERBOSE
// Get the USB Host Controller power map
dwSuccess = GetHostControllerPowerMap(hHCDev, hcInfo);
if (ERROR_SUCCESS != dwSuccess)
{
OOPS();
}
#endif
// Get bus, device, and function
//
hcInfo->BusDeviceFunctionValid = FALSE;
success = SetupDiGetDeviceRegistryProperty(deviceInfo,
deviceInfoData,
SPDRP_BUSNUMBER,
NULL,
(PBYTE)&hcInfo->BusNumber,
sizeof(hcInfo->BusNumber),
NULL);
if (success)
{
success = SetupDiGetDeviceRegistryProperty(deviceInfo,
deviceInfoData,
SPDRP_ADDRESS,
NULL,
(PBYTE)&deviceAndFunction,
sizeof(deviceAndFunction),
NULL);
}
if (success)
{
hcInfo->BusDevice = deviceAndFunction >> 16;
hcInfo->BusFunction = deviceAndFunction & 0xffff;
hcInfo->BusDeviceFunctionValid = TRUE;
}
// #ifdef SERIALIZE_VERBOSE
// Get the USB Host Controller info
dwSuccess = GetHostControllerInfo(hHCDev, hcInfo);
if (ERROR_SUCCESS != dwSuccess)
{
OOPS();
}
// #endif
// Add this host controller to the USB device tree view.
//
hHCItem = AddLeaf(hTreeParent,
(LPARAM)hcInfo,
leafName,
hcInfo->Revision == UsbSuperSpeed ? GoodSsDeviceIcon : GoodDeviceIcon);
if (NULL == hHCItem)
{
// Failure adding host controller to USB device tree
// view.
OOPS();
FREE(driverKeyName);
FREE(hcInfo);
return NULL;
}
// Add this host controller to the list of enumerated
// host controllers.
//
EnumeratedHCList.push_back(hcInfo);
// Get the name of the root hub for this host
// controller and then enumerate the root hub.
//
rootHubName = GetRootHubName(hHCDev);
if (rootHubName != NULL)
{
size_t cbHubName = 0;
HRESULT hr = S_OK;
hr = StringCbLength(rootHubName, MAX_DRIVER_KEY_NAME, &cbHubName);
if (SUCCEEDED(hr))
{
PUSBROOTHUBINFO info = EnumerateHub(hHCItem,
rootHubName,
cbHubName,
NULL, // ConnectionInfo
NULL, // ConnectionInfoV2
NULL, // PortConnectorProps
NULL, // ConfigDesc
NULL, // BosDesc
NULL, // StringDescs
NULL); // We do not pass DevProps for RootHub
hcInfo->RootHub = info;
}
}
else
{
// Failure obtaining root hub name.
OOPS();
}
return hcInfo;
}
//*****************************************************************************
//
// EnumerateHub()
//
// hTreeParent - Handle of the TreeView item under which this hub should be
// added.
//
// HubName - Name of this hub. This pointer is kept so the caller can neither
// free nor reuse this memory.
//
// ConnectionInfo - NULL if this is a root hub, else this is the connection
// info for an external hub. This pointer is kept so the caller can neither
// free nor reuse this memory.
//
// ConfigDesc - NULL if this is a root hub, else this is the Configuration
// Descriptor for an external hub. This pointer is kept so the caller can
// neither free nor reuse this memory.
//
// StringDescs - NULL if this is a root hub.
//
// DevProps - Device properties of the hub
//
//*****************************************************************************
PUSBROOTHUBINFO
EnumerateHub (
HTREEITEM hTreeParent,
_In_reads_(cbHubName) PWCHAR HubName,
_In_ size_t cbHubName,
_In_opt_ PUSB_NODE_CONNECTION_INFORMATION_EX ConnectionInfo,
_In_opt_ PUSB_NODE_CONNECTION_INFORMATION_EX_V2 ConnectionInfoV2,
_In_opt_ PUSB_PORT_CONNECTOR_PROPERTIES PortConnectorProps,
_In_opt_ PUSB_DESCRIPTOR_REQUEST ConfigDesc,
_In_opt_ PUSB_DESCRIPTOR_REQUEST BosDesc,
_In_opt_ PSTRING_DESCRIPTOR_NODE StringDescs,
_In_opt_ PUSB_DEVICE_PNP_STRINGS DevProps
)
{
// Initialize locals to not allocated state so the error cleanup routine
// only tries to cleanup things that were successfully allocated.
//
PUSB_NODE_INFORMATION hubInfo = NULL;
PUSB_HUB_INFORMATION_EX hubInfoEx = NULL;
#ifdef SERIALIZE_VERBOSE
PUSB_HUB_CAPABILITIES_EX hubCapabilityEx = NULL;
#endif
HANDLE hHubDevice = INVALID_HANDLE_VALUE;
HTREEITEM hItem = NULL;
PUSBROOTHUBINFO info = NULL;
PWCHAR deviceName = NULL;
ULONG nBytes = 0;
BOOL success = 0;
DWORD dwSizeOfLeafName = 0;
WCHAR leafName[512] = {0};
HRESULT hr = S_OK;
size_t cchHeader = 0;
size_t cchFullHubName = 0;
std::vector<PUSBDEVICEINFO> ports;
// Allocate some space for a USBDEVICEINFO structure to hold the
// hub info, hub name, and connection info pointers. GPTR zero
// initializes the structure for us.
//
info = (PUSBROOTHUBINFO)ALLOC(sizeof(USBEXTERNALHUBINFO));
if (info == NULL)
{
OOPS();
goto EnumerateHubError;
}
// Allocate some space for a USB_NODE_INFORMATION structure for this Hub
//
hubInfo = (PUSB_NODE_INFORMATION)ALLOC(sizeof(USB_NODE_INFORMATION));
if (hubInfo == NULL)
{
OOPS();
goto EnumerateHubError;
}
hubInfoEx = (PUSB_HUB_INFORMATION_EX)ALLOC(sizeof(USB_HUB_INFORMATION_EX));
if (hubInfoEx == NULL)
{
OOPS();
goto EnumerateHubError;
}
#ifdef SERIALIZE_VERBOSE
hubCapabilityEx = (PUSB_HUB_CAPABILITIES_EX)ALLOC(sizeof(USB_HUB_CAPABILITIES_EX));
if(hubCapabilityEx == NULL)
{
OOPS();
goto EnumerateHubError;
}
#endif
// Keep copies of the Hub Name, Connection Info, and Configuration
// Descriptor pointers
//
((PUSBROOTHUBINFO)info)->HubInfo = hubInfo;
((PUSBROOTHUBINFO)info)->HubName = HubName;
if (ConnectionInfo != NULL)
{
((PUSBEXTERNALHUBINFO)info)->DeviceInfoType = ExternalHubInfo;
((PUSBEXTERNALHUBINFO)info)->ConnectionInfo = ConnectionInfo;
((PUSBEXTERNALHUBINFO)info)->StringDescs = StringDescs;
((PUSBEXTERNALHUBINFO)info)->PortConnectorProps = PortConnectorProps;
((PUSBEXTERNALHUBINFO)info)->HubInfoEx = hubInfoEx;
((PUSBEXTERNALHUBINFO)info)->ConnectionInfoV2 = ConnectionInfoV2;
((PUSBEXTERNALHUBINFO)info)->UsbDeviceProperties = DevProps;
#ifdef SERIALIZE_VERBOSE
((PUSBEXTERNALHUBINFO)info)->HubCapabilityEx = hubCapabilityEx;
((PUSBEXTERNALHUBINFO)info)->ConfigDesc = ConfigDesc;
((PUSBEXTERNALHUBINFO)info)->BosDesc = BosDesc;
#endif
}
else
{
((PUSBROOTHUBINFO)info)->DeviceInfoType = RootHubInfo;
((PUSBROOTHUBINFO)info)->HubInfoEx = hubInfoEx;
((PUSBROOTHUBINFO)info)->PortConnectorProps = PortConnectorProps;
#ifdef SERIALIZE_VERBOSE
((PUSBROOTHUBINFO)info)->HubCapabilityEx = hubCapabilityEx;
((PUSBROOTHUBINFO)info)->UsbDeviceProperties = DevProps;
#endif
}
// Allocate a temp buffer for the full hub device name.
//
hr = StringCbLength(L"\\\\.\\", MAX_DEVICE_PROP, &cchHeader);
if (FAILED(hr))
{
goto EnumerateHubError;
}
cchFullHubName = cchHeader + cbHubName + sizeof(WCHAR);
deviceName = (PWCHAR)ALLOC((DWORD) cchFullHubName);
if (deviceName == NULL)
{
OOPS();
goto EnumerateHubError;
}
// Create the full hub device name
//
hr = StringCchCopyN(deviceName, cchFullHubName, L"\\\\.\\", cchHeader);
if (FAILED(hr))
{
goto EnumerateHubError;
}
hr = StringCchCatN(deviceName, cchFullHubName, HubName, cbHubName);
if (FAILED(hr))
{
goto EnumerateHubError;
}
// Try to hub the open device
//
hHubDevice = CreateFile(deviceName,
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
// Done with temp buffer for full hub device name
//
FREE(deviceName);
if (hHubDevice == INVALID_HANDLE_VALUE)
{
OOPS();
goto EnumerateHubError;
}
//
// Now query USBHUB for the USB_NODE_INFORMATION structure for this hub.
// This will tell us the number of downstream ports to enumerate, among
// other things.
//
success = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_NODE_INFORMATION,
hubInfo,
sizeof(USB_NODE_INFORMATION),
hubInfo,
sizeof(USB_NODE_INFORMATION),
&nBytes,
NULL);
if (!success)
{
OOPS();
goto EnumerateHubError;
}
success = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_HUB_INFORMATION_EX,
hubInfoEx,
sizeof(USB_HUB_INFORMATION_EX),
hubInfoEx,
sizeof(USB_HUB_INFORMATION_EX),
&nBytes,
NULL);
//
// Fail gracefully for downlevel OS's from Win8
//
if (!success || nBytes < sizeof(USB_HUB_INFORMATION_EX))
{
FREE(hubInfoEx);
hubInfoEx = NULL;
if (ConnectionInfo != NULL)
{
((PUSBEXTERNALHUBINFO)info)->HubInfoEx = NULL;
}
else
{
((PUSBROOTHUBINFO)info)->HubInfoEx = NULL;
}
}
//
// Obtain Hub Capabilities
//
#ifdef SERIALIZE_VERBOSE
success = DeviceIoControl(hHubDevice,
IOCTL_USB_GET_HUB_CAPABILITIES_EX,
hubCapabilityEx,
sizeof(USB_HUB_CAPABILITIES_EX),
hubCapabilityEx,
sizeof(USB_HUB_CAPABILITIES_EX),
&nBytes,
NULL);
//
// Fail gracefully
//
if (!success || nBytes < sizeof(USB_HUB_CAPABILITIES_EX))
{
FREE(hubCapabilityEx);
hubCapabilityEx = NULL;
if (ConnectionInfo != NULL)
{
((PUSBEXTERNALHUBINFO)info)->HubCapabilityEx = NULL;
}
else
{
((PUSBROOTHUBINFO)info)->HubCapabilityEx = NULL;
}
}
#endif
// Build the leaf name from the port number and the device description
//
dwSizeOfLeafName = sizeof(leafName);
if (ConnectionInfo)
{
StringCchPrintf(leafName, dwSizeOfLeafName, L"[Port%d] ", ConnectionInfo->ConnectionIndex);
StringCchCat(leafName,
dwSizeOfLeafName,
ConnectionStatuses[ConnectionInfo->ConnectionStatus]);
StringCchCatN(leafName,
dwSizeOfLeafName,
L" : ",
sizeof(L" : "));
}
if (DevProps)
{
size_t cbDeviceDesc = 0;
hr = StringCbLength(DevProps->DeviceDesc, MAX_DRIVER_KEY_NAME, &cbDeviceDesc);
if(SUCCEEDED(hr))
{
StringCchCatN(leafName,
dwSizeOfLeafName,
DevProps->DeviceDesc,
cbDeviceDesc);
}
}
else
{
if(ConnectionInfo != NULL)
{
// External hub
StringCchCatN(leafName,
dwSizeOfLeafName,
HubName,
cbHubName);
}
else
{
// Root hub
StringCchCatN(leafName,
dwSizeOfLeafName,
L"RootHub",
sizeof(L"RootHub"));
}
}
// Now add an item to the TreeView with the PUSBDEVICEINFO pointer info
// as the LPARAM reference value containing everything we know about the
// hub.
//
hItem = AddLeaf(hTreeParent,
(LPARAM)info,
leafName,
HubIcon);
if (hItem == NULL)
{
OOPS();
goto EnumerateHubError;
}
// Now recursively enumerate the ports of this hub.
//
ports = EnumerateHubPorts(
hItem,
hHubDevice,
hubInfo->u.HubInformation.HubDescriptor.bNumberOfPorts
);
info->HubPorts = ports;
CloseHandle(hHubDevice);
return info;
EnumerateHubError:
//
// Clean up any stuff that got allocated
//
if (hHubDevice != INVALID_HANDLE_VALUE)
{
CloseHandle(hHubDevice);
hHubDevice = INVALID_HANDLE_VALUE;
}
if (hubInfo)
{
FREE(hubInfo);
}
if (hubInfoEx)
{
FREE(hubInfoEx);
}
if (info)
{
FREE(info);
}
if (HubName)
{
FREE(HubName);
}
if (ConnectionInfo)
{
FREE(ConnectionInfo);
}
if (ConfigDesc)
{
FREE(ConfigDesc);
}
if (BosDesc)
{
FREE(BosDesc);
}
if (StringDescs != NULL)
{
PSTRING_DESCRIPTOR_NODE Next;
do {
Next = StringDescs->Next;
FREE(StringDescs);
StringDescs = Next;
} while (StringDescs != NULL);
}
return NULL;
}
//*****************************************************************************
//
// EnumerateHubPorts()
//
// hTreeParent - Handle of the TreeView item under which the hub port should
// be added.
//
// hHubDevice - Handle of the hub device to enumerate.
//
// NumPorts - Number of ports on the hub.
//
//*****************************************************************************
std::vector<PUSBDEVICEINFO>
EnumerateHubPorts (
HTREEITEM hTreeParent,
HANDLE hHubDevice,
ULONG NumPorts
)
{
ULONG index = 0;
BOOL success = 0;
HRESULT hr = S_OK;
PWCHAR driverKeyName = NULL;
PUSB_DEVICE_PNP_STRINGS DevProps;
DWORD dwSizeOfLeafName = 0;
WCHAR leafName[512];
int icon = 0;