Hi,

I'm implementing a driver that extends IOSCSIPeripheralDeviceType00 as I need to send custom SCSI commands to a device.

I'm following the VendorSpecificType00 and SimpleUserClient examples and http://wagerlabs.com/writing-a-mac-osx-usb-device-driver-that-impl as an example.

I built my kernel extension and it loads fine with kextload and it shows up in kextstat.

The problem is that I can't locate it in my user space code.

Here's the important (I think) part of:

• my driver code:
  #define super IOSCSIPeripheralDeviceType00 OSDefineMetaClassAndStructors(com_mycompany_driver_Foo, IOSCSIPeripheralDeviceType00)

• my user client code:
  #define super IOUserClient OSDefineMetaClassAndStructors(com_mycompany_driver_FooUserClient, IOUserClient)

• the plist:
  CFBundleIdentifier -> com.mycompany.driver.Foo
IOCLass -> com_mycompany_driver_Foo
IOUserClientClass -> com_mycompany_driver_FooUserClient
IOProviderClass -> IOSCSIPeripheralDeviceNub

Here's how I try to locate the driver in my user space code (similar to SimpleUserClient):

dictRef = IOServiceMatching("com_mycompany_driver_Foo");
kernResult = IOServiceGetMatchingServices(kIOMasterPortDefault, dictRef, &iterator);

When I execute the code, iterator is 0.

I noticed that in the VendorSpecificType00 code, the localization of the driver is done differently:
dictRef = IOServiceMatching("IOBlockStorageServices");
kr = IOServiceGetMatchingServices(kIOMasterPortDefault, dictRef, &iter);
while ((service = IOIteratorNext(iter))) {
io_registry_entry_t parent;
kr = IORegistryEntryGetParentEntry(service, kIOServicePlane, &parent);
...
// We're only interested in the parent object if it's our driver class.
if (IOObjectConformsTo(parent, "com_apple_dts_driver_VendorSpecificType00")) {

I tried doing that but it didn't work either.

Thanks for reading and your help,
-L