From owner-freebsd-net@freebsd.org  Wed Jun  1 17:06:39 2016
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Date: Wed, 01 Jun 2016 10:39:46 -0600
To: Rui Paulo <rpaulo@me.com>, net@freebsd.org
From: Brett Glass <brett@lariat.net>
Subject: Re: MPPC for Netgraph: Isn't it time?
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References: <201605311758.LAA27388@mail.lariat.net>
 <1464759616.15911.9.camel@me.com>
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At 11:40 PM 5/31/2016, Rui Paulo wrote:

>On Tue, 2016-05-31 at 11:55 -0600, Brett Glass wrote:
> > Everyone:
> >
> > Just built a kernel today, and realized that for years I have hadÂ
> > to integrate MPPC compression/encryption (see man page ng_mppc(4))Â
> > for PPP/L2TP/PPTP manually, even though the HiFn patent has longÂ
> > since expired and there's no reason not to include the files in theÂ
> > FreeBSD code base. Could a committer with access to that part ofÂ
> > the tree please import the files mppc.h, mppcc.c, and mppcd.c intoÂ
> > /sys/net so there's no need to find and fetch them every time?
>
>No committer with a sane mind will import code knowing there's a patent
>even if it's expired because TANAL (They Are Not Lawyers).
>
>It's best to contact the FreeBSD Foundation to analyse the status of
>the patent first.

The status of the patent is well known. All Linux distributions now
ship with a version of PoPToP (an inferior PPTP implementation) that
includes MPPC.

--Brett Glass