DriverKit - SetProperties

Hi,

I'm currently port old driver to DriverKit framework.

This driver use the properties mechanism to change the state of the device from user space. I would like also use it, but I can not force the call to overridden SetProperties function on driver site.

Is it possible that SetProperties will be called when client call IOConnectSetCFProperties on given service? or I have to use the ExternalMethod mechanism. Or I will be possible to pass some dictionary structure which will mimic the SetProperty Call.

Thank you for your answer.

Best Regards, Andrzej

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andrew2412
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For this application, the best answer is likely to implement a userclient. You can find a sample for this here: https://developer.apple.com/documentation/driverkit/communicating_between_a_driverkit_extension_and_a_client_app?language=objc

This should allow you to send and receive arbitrary data from your dext, which should allow you to implement settings for your dext.

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Drewbadour
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  • Thank you for your answer. I'm aware of the existence of a user client. I've already verified that this approach is working, but it requires quite a big reimplementation of the driver, which I have.

    As UserClient implements the IOService, I would like to force the call of overridden setProperties via IOConnectSetCFProperties call from the client-side, also It will be enough for me to pass the dictionary via ExternalMethod call, but CFDictionary seems to be impossible to pass.

    —
    andrew2412
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