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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Network Kernel Extensions
The kernel supports extending the network stack at multiple levels through the Network Kernel Extensions (NKE) mechanism. An NKE is no different from a regular KEXT; it is merely a term used to describe a KEXT that interfaces with or extends the network stack.
As such, NKEs are also dynamically loadable and unloadable at runtime. NKEs are not part of the I/O Kit, but located in the BSD layer. The NKE mechanism is unique to Mac OS X and not found in BSD UNIX flavors, such as FreeBSD.
An NKE can be used for many purposes. Some examples of use include, but are not limited to, the following:
- Custom firewall or security mechanisms, such as encryption
- Adding support for new protocols
- Adding support for new network interfaces ...
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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.
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