... If you choose to write a device driver, you must take everything written here as a guide, and no more. ... Network Device Drivers . ... I put up some (slightly outdated by now, but still worth reading, I think) notes for a talk I gave in May 1995 entitled Writing Linux Device Drivers , which is specifically oriented at character devices implemented as kernel runtime-loadable modules. ... Issue 29 is slated (as of this writing) to have an article on writing network device drivers, written by Alan Cox...