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SubjectRe: network drivers and user interface
> - network device drivers in userland: is there a better way to feed
> packets into/out of the kernel to a userland network driver than
> converting the packets to SLIP and feeding them into a pty?
> I have some DSP boards which could be used as ham radio modems easily
> with a driver in userland...

SLIP is pretty efficient but the answer is yes at the moment. I have a
driver called psi2 that mostly works how I think god intended it an want
to get merged in. I'm happily doing over 1Mbit/second over a SLIP hack 8)

> - the other way round: is there an interface that allows me to get
> every packet in raw form of a single network driver? I know the
> SOCK_PACKET stuff, but there I get every packet of the specified type

Use bind*() with SOCK_PACKET

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