[lwip-devel] Re: lwIP on RTLinux-GPL

[Leon Woestenberg]

Hello Sergio, and -devel subscribers,

the lwIP source code was initially placed under BSD license by the
Swedish Institute of Computer Science. Authored by Adam Dunkels.

Adam and SICS have approved with any use of lwIP as long as the
BSD license is adhered to.

I think including BSD in GPL code is fine (at least the Linux kernel
does so as well... and neatly mention this fact in the comments.)

> Hello, Leon. I sent you a mail asking you about the terms to include the
lwIP
> porting to RTLinux in the CVS branch time ago. The porting goes as
follows:
> -- The lwIP files hasn't been modified at all (Maybe the includes to work
with
>  RTLinux). The BSD license has been kept there.
>
> -- The porting file (sys_arch) has been released under the terms of the
GPL license.
> -- Other tools are included. (GPL)
> -- The Asynchronous DNS resolver has been included. (BSD)
> -- Some examples have been included using all APIs. (GPL)
> -- Some RTLinux Ethernet drivers have been included. (GPL)
>
I see no problems in this approach.

> I think that there are some portings with the GPL license (only in the
porting
> file), so I don't know if you did not answer me because of this "aspect"
(GPL)
> or maybe because you were too busy and the e-mail got lost.
>
The ports have their respective owners. If you feel unsure about certain
licenses
or copyright notices, try to contact them.

> I would follow your instructions to correctly adapt my porting to your
demands.
>
Sorry for not answering your question (too busy and your email is left
unanswered)
but I see no legal problems.

The licenses themselves should provide you with enough info and what you can
and cannot do.

All my personally added lwIP stuff is BSD licensed.

Regards,

Leon Woestenberg.