site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Thread-index: AcUUkMpUGM5Xnal8TeuI2sM570c7AgAf4ybw Thread-topic: Callback from NKE Vincent- Excuse my igronance, being I am new to both Mac OS X and unix, from what you wrote below, then you are saying that my select() or CFSocket would be intiated and used in userland? Do you know of any example code using this method? Thanks Carl -----Original Message----- From: Vincent Lubet Sent: Wednesday, February 16, 2005 8:33 PM To: Carl Cc: darwin-kernel@lists.apple.com Subject: Re: Callback from NKE Carl, Your userland program uses a kernel control socket file descriptor to communicate with your kernel control module. A kernel control socket file descriptor is above all a file descriptor so you can use a kernel control socket file descriptor userland API that work with socket file descriptors. To avoid to poll you can for example use select() or CFSocket for this with a call back function. Vincent On Feb 16, 2005, at 3:24 PM, Carl Smith wrote:

I have an NKE that I currently have registered using ctl_register function and from my userland I connect to the NKE using sockets, that is calling socket(PF_SYSTEM, SOCK_DGRM, SYSPROTO_CONTROL) then on success connect().

What I would like to do is be able for the NKE to signal or notify the app when it has some something to do or send, without the app going into a constant loop waiting for data via a recv() function.

Someone had mentioned the possibility of using CFSocket for this with a call back function.

I am not sure if this possible using a NKE and that is my question. Can my idea be done using CFSocket and if yes are there any examples of this using a kext? Of if not any other suggestions?

Thanks

Carl

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