December 2011
Intermediate to advanced
485 pages
15h 47m
English
Content preview from OS X and iOS Kernel ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Kernel Control KPI
The kernel control interface <sys/kern_control.h> is a KPI, which allows a KEXT to communicate bi-directionally with user space processes. The kernel control system lives in the BSD portion of the kernel and is therefore written in C and not C++ (I/O Kit uses C++).
The KPI is intended to allow a user space program to control and configure a KEXT. For example, let's say you had implemented a custom firewall NKE (Network Kernel Extension). You could then use the kernel control API to tell your firewall which addresses or ports it should block traffic from, as well as retrieving logs and statistics.
The KPI is relatively simple to use in both kernel space and user space. In fact, there is no special API required to use the kernel ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.