Re: why not a libpf

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02-18-2008, 08:53 AM

Theo de Raadt

Posts: n/a

Re: why not a libpf

> > I have a question concerning some pf-manipulating
> > codes like
> > authpf/ftp-proxy and others.
> > Why pf (rule optimisation|parser|ioctl wrappers)
> > manipulation functions
> > are not implemented in an external library (a libpf
> > for exemple).
> > Thus, code from pfctl could be reused intead of
> > doing some exec*() call
> > in C code.
> > Is it a choice ?
> >
> >
> > Cheers,
> > Francois Visconte
> >
> >
>
> I once tried to implement, just for the fun, a pfsh
> and started working on libpf. most of the code was
> borowed from pfctl itself. maybe i can find that code
> somewhere in here.

If we had a library, we would have two pieces of code that need to be
modified when we make a change. That increases the potential for
error. Also, piping pf data (especially for anchors) into a pfctl
invocation is way more powerful, since you get all the grammer and
features.

We have thought about it before. We rejected the idea. Sorry.

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Re: why not a libpf