File Descriptor Transfer over Unix Domain Sockets

Re:File Descriptor Transfer over Unix Domain Sockets by Joker_vD on Monday November 02, 2020 @11:00AM (#24969513)

Thanks for clarifying!

And I guess one could still implement an LSP in the user mode while supporting DuplicateHandle directly, without all the WSADuplicateSocket stuff, by having a service with all the custom logic, and returning pipes into this service as socket handles. That's basically what a microkernel would do as well, right?

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Re:File Descriptor Transfer over Unix Domain Sockets by muststopmyths on Monday November 02, 2020 @11:40AM (#24969988)

I guess you technically could, because the handle your LSP returns is entirely up to it.

Haven't thought about microkernels in a couple of decades :), but yes, I can see how what you are saying could work since the handle will technically be a duplicatable kernel handle. It might be better for the service (or subsystem in NT microkernel terminology) to have a driver so that the client can reference it with a proper, dedicated handle, but that's a bit beyond my wheelhouse as to which approach is better.

Edit: Completely forgot about ws2ifsl.sys which is a driver that exists just to give Non-IFS providers a kernel handle with the WPUCreateSocketHandle() call !

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