It's a pretty amazing problem--a wifi chipset. The driver runs on Linux and Windows, also supports 3x different CPU architectures (x86, mips, arm) and multiple

It's a pretty amazing problem--a wifi chipset. The driver runs on Linux and Windows, also supports 3x different CPU architectures (x86, mips, arm) and multiple bus interfaces (SoC internal, usb, pci). Supports disabling optional features so 2.4Ghz only chipsets have a smaller memory footprint. Can build with/without different security options. And that's just starting in on the huge number IEEE 802.11 standards across the last 20 years. Some chips support some of the features, some don't -- but the driver still has to work on all of them. Linux kernel is an amazing example of how to do ^^^that and still produce beautiful code. The Linux kernel uses a great number of function pointers to accomplish their encapsulation goal.