Re: [lwip-members] lwip in ecos

[Leon Woestenberg]

Hello Jani,

> there has been discussion on including lwip in ecos as an alternative
> to the two other tcp stacks in there (openbsd and freebsd based respectively)
> The ecos maintainers are ok with this their most important issue is to
> avoid any kind of licensing problems. I am almost sure this is all fine I just 
> want
> to get feedback in case I missed something.
Thanks for that effort. lwIP should fit eCos well.

> ecos is licensed under GPL + exception (meaning it can be linked to closed apps)
> the other bsd stacks are a mixture of BSD w/ and w/o advertising much like lwip 
> is.
> This makes it look like as long as the copyright headers are kept intact in the 
> sources
> all is fine. (ecos sources add their own license header to the source files)
> I know we have been keeping Copyright SICS notices even though there's no 
> formal assignment
> to sics on behalf of the lwip developers. Also there are several people's 
> Copyright notes
> in there (Leon, Marc Boucher and original ppp developers)
The copyright notes being there, does not exclude it from being a BSD 
licensed piece of software.

It just means the copyright holders enforce the use of the BSD license.

Would the eCos people object to the copyrights being there?

When we placed lwIP into the Savannah repository, Adam Dunkels and SICS 
have agreed to move the stack into the BSD license. The lwIP code is
checked in with BSD license headers. The Savannah project clearly 
mentions the license on the home page:

http://savannah.nongnu.org/projects/lwip/

"Modified BSD" license; I think modified in the sense mentioned here:

http://www.opensource.org/licenses/bsd-license.php

I wish Adam Dunkels is listening in on this list, and could confirm all 
of the above.

> So does anybody see a reason why lwip or parts of it might not be included and 
> distributed with ecos?
No.

But I should mention that the PPP part of lwIP has kind of awkward 
headers in there. Maybe its author(s) should stand up and explain.


Regards,

Leon.