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Re: sosend, soreceive, soconnect

On Monday, January 19, 2004, at 09:05 PM, Matt Jaffa wrote:

Amanda and others:

I would love to implement what SimpleUserClient is doing but with my application, instead of the KERNEL socket AF_UNIX implementation, I don't know exactly how to do it.

You can't use the UserClient interface for your project, since it is designed for IOKit usage, and yours is not an IOKit kext.

So I have a KEXT that is a socket/Protocol filter. And I insert my code to do all the checking within the send function that is within my filter.

How am i supposed to do this,

You need to review kernel code. I don't think there is anyone else with enough time to design and program your project for you.

my daemon will keep checking with the KEXT to see if it has work to do? And within my send function i block it with a semaphore??? Until the daemon picks it up, signals then does work and then the daemon goes back to checking for work to do????

As I mentioned earlier, there is code in the 'bsd/netat' directory that does something similar. NFS clients and servers do similar things, but the code is much more complex than the AURP 'daemon' that runs (or, more accurately, ran) in kernel mode. As long as you want to block awaiting incoming datagrams, you need a thread on which to sleep, and therefore you need to create a kernel process.

And what if the daemon is not running, it won't be polling for work to do, so the stuff that is sitting in semaphore_wait mode will always wait and nothing will work.

If your user-mode component is not running, the kernel-mode component should exit. The AURP code should give a hint regarding the way to do this. See also the NFS client and server code.

Please advise me in this area,
I am looking to finish my project quickly.

You will need to adjust your goals. It doesn't appear that you have much experience with this kind of development, and this is tricky code.

What do you have running so far?

Regards,

Justin

--
Justin C. Walker, Curmudgeon-At-Large *
Institute for General Semantics | It's not whether you win or lose...
| It's whether *I* win or lose.
*--------------------------------------*-------------------------------*
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 >Re: sosend, soreceive, soconnect (From: Matt Jaffa <email@hidden>)



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