site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com or am I missing something? On Nov 10, 2006, at 9:30 PM, Curtis Jones wrote: WHY? This is just wrong on so many levels... Thankfully in this case I'm not so masochistic as to want to do network communication from within the kernel. A fun exercise perhaps, but definitely not practical. In this case I have a network kernel extension that is evaluating some criteria ("rules") for each new socket connection (among other things)*. One aspect of a rule is a remote endpoint address (or dns name). So, this is where my need comes from to do the resolution. So while I understand that I should do DNS resolution in the user space, I would prefer to block as little as possible when within the data path of a socket. Add a trip to user space and back is minor in comparison with actually performing the DNS resolution, I know. I was looking at each step and considering which could possibly be removed for the sake of that aforementioned data path. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... Unless you are implementing some sort of "proxy" and/or analyzing actual data sent via sockets, "... remote endpoint address ..." is going to be address (not a host name) On 11/10/06, William Kucharski <kucharsk@mac.com> wrote: If you ever need to do this type of thing, you need to take a step back and figure out why you're trying to this from the KERNEL. I can't even really think of one. The right way to do this is to have a user space process do the DNS resolution and pass the information to your kernel extension; better yet would be for a user space daemon to do both the DNS resolution AND all network communication. * Sounds like a firewall, I know. Similar concept; different application. -Curtis _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/andrei% 40tchijov.com This email sent to andrei@tchijov.com This email sent to site_archiver@lists.apple.com