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Re: Bsd sockets in a kext

I'm not sure this is the way to go for such a small amount of data. When this has been asked about before, it was suggested that the daemon connect to your kext via the IOUserClient mechanism and repeatedly wait for it to send back input. This is essentially a pull instead of push process.

If your kext only has to launch programs, can you use KUNCExecute?

Shantonu

On Friday, March 8, 2002, at 01:04 PM, Justin C. Walker wrote:

Hi, Stephane,

On Friday, March 8, 2002, at 03:51 AM, Stephane ODUL wrote:

I9m writing a driver to handle multimedia key for a usb keyboard.

My kext need to send message to a user process daemon.

I9ve tried to setup the communication using the bsd sockets. My daemon
compile fine but the when I build the kext I have an error saying functions
like socket() are not declared while <sys/socket.h> is included.

Maybe I9m not using the good solution. Help me I ve been stucked on this for
3 days now.

I'm not sure what the problem is. Are you using 'socket(2)' in the user-space daemon, or in the kext? You can't use user-space calls in the kernel, because the operating environments are completely different.

You will need to use kernel versions of the user-mode calls in your kext. There isn't any good documentation on this, but you can refer to the Wright/Stevens book (TCP/IP Illustrated, V2) for descriptions of the in-kernel code; and you can look at the 'xnu' source from Darwin for examples of this use, in NFS (xnu/bsd/nfs) and in the AURP code (xnu/bsd/netat/aurp*).

This has also been discussed on the Darwin lists, so you might get some good pointers from the archives.

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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References: 
 >Re: Bsd sockets in a kext (From: "Justin C. Walker" <email@hidden>)



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