Enumerating Interfaces

[Max Yaffe]

Dear Group:

I'm trying to enumerate a list of all devices belonging to a given
class and for each device, enumerate a list of all interfaces
associated with that device.

I've poured over the SetupDIxxx documentation & am now thoroughly
confused. Here's a sample of the code I've tried:


GUID ClassGuid = CLASS_GUID;
GUID InterfaceGuid1 = INTERFACE_GUID_1;
GUID InterfaceGuid2 = INTERFACE_GUID_2;

DWORD DeviceListLoad()
{
HDEVINFO hDeviceInfoSet;
DWORD DeviceEnum;
DWORD InterfaceEnum;
LPDEVICE lpDevice;
DWORD LastError;

// Get a list of all devices which have CMS Version 5.0 GUID
hDeviceInfoSet = SetupDiGetClassDevs(
&ClassGuid,
NULL, // no enumerator
NULL, // Define no UI window
DIGCF_PRESENT // Only Devices present
);

for (DeviceEnum=0;;DeviceEnum++)
{
SP_DEVINFO_DATA DeviceInfoData;
ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA));
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);

// Get the DeviceInfoData
if (FALSE == SetupDiEnumDeviceInfo(
hDeviceInfoSet,
DevEnum,
&DeviceInfoData))
{
LastError = GetLastError();
if (ERROR_NO_MORE_ITEMS = LastError)
// At the end of the device set
break;
else
// A real error happened
return LastError;
}
for (InterfaceEnum = 0; ; InterfaceEnum++)
{
SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
ZeroMemory(&DeviceInterfaceData,
sizeof(SP_DEVICE_INTERFACE_DATA));
DeviceInterfaceData.cbSize =
sizeof(SP_DEVICE_INTERFACE_DATA);


// Get an interface
if (FALSE == SetupDiEnumDeviceInterfaces(
hDeviceInfoSet,
lpDeviceInfoData,
==>> &Guid, //IN WHAT GOES HERE???
InterfaceEnum,
&DeviceInterfaceData))
{
LastError = GetLastError();
if (ERROR_NO_MORE_ITEMS = LastError)
// At the end of the list
break;
else
// A real error happened.
return LastError;
}

//
// OK We found a device of our class
// which containes an InterfaceGuid.
if (DeviceInterfaceData.InterfaceClassGuid ==
InterfaceGuid1)
DoSomethingToDevice(...);
else if (DeviceInterfaceData.InterfaceClassGuid ==
InterfaceGuid2)
DoSomethingDifferentToDevice(...);
else
DontDoAnything();

}
}

SetupDiDestroyDeviceInfoList(hDeviceInfoSet);
return ERROR_SUCCESS;
}


OK so this can't work since I'm looking for an interface GUID & can't
supply one.

So how can I get a list of interfaces belonging to a device of a given
class?

Thanks for your help in advance
Max

 

[Guest]

-----ԭʼÏûÏ¢-----
Dear Group:

I'm trying to enumerate a list of all devices belonging to a given
class and for each device, enumerate a list of all interfaces
associated with that device.

I've poured over the SetupDIxxx documentation & am now thoroughly
confused. Here's a sample of the code I've tried:


GUID ClassGuid = CLASS_GUID;
GUID InterfaceGuid1 = INTERFACE_GUID_1;
GUID InterfaceGuid2 = INTERFACE_GUID_2;

DWORD DeviceListLoad()
{
HDEVINFO hDeviceInfoSet;
DWORD DeviceEnum;
DWORD InterfaceEnum;
LPDEVICE lpDevice;
DWORD LastError;

// Get a list of all devices which have CMS Version 5.0 GUID
hDeviceInfoSet = SetupDiGetClassDevs(
&ClassGuid,
NULL, // no enumerator
NULL, // Define no UI window
DIGCF_PRESENT // Only Devices present
);

for (DeviceEnum=0;;DeviceEnum++)
{
SP_DEVINFO_DATA DeviceInfoData;
ZeroMemory(&DeviceInfoData, sizeof (SP_DEVINFO_DATA));
DeviceInfoData.cbSize = sizeof (SP_DEVINFO_DATA);

// Get the DeviceInfoData
if (FALSE == SetupDiEnumDeviceInfo(
hDeviceInfoSet,
DevEnum,
&DeviceInfoData))
{
LastError = GetLastError();
if (ERROR_NO_MORE_ITEMS = LastError)
// At the end of the device set
break;
else
// A real error happened
return LastError;
}
for (InterfaceEnum = 0; ; InterfaceEnum++)
{
SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
ZeroMemory (&DeviceInterfaceData,
sizeof (SP_DEVICE_INTERFACE_DATA));
DeviceInterfaceData.cbSize =
(SP_DEVICE_INTERFACE_DATA);


// Get an interface
if (FALSE == SetupDiEnumDeviceInterfaces(


==>> &Guid, //IN WHAT GOES HERE???
InterfaceEnum,

{
LastError = GetLastError();
if

(ERROR_NO_MORE_ITEMS = LastError)

// At the end of the list
break;
else
// A real error happened.
return LastError;
}

//
// OK We found a device of our class
// which containes an InterfaceGuid.
if

(DeviceInterfaceData.InterfaceClassGuid ==

InterfaceGuid1)
DoSomethingToDevice (...);
else if

(DeviceInterfaceData.InterfaceClassGuid ==

 

[Doron Holan [MS]]

since the interface has a set of IOCTLs and rules, enumerating interfaces
generically buys you nothing. that is why there is no facility to enumerate
them this way. if you know the GUID, you can enum all of theinstances of
that interface guid

d