Re: lwIP

[Simon Kallweit <simon dot kallweit at intefo dot ch>]

John Dallaway wrote:
> This looks like an excellent opportunity to demonstrate the benefits of
> our free open source development model.
>
> In a perfect world, it would be great to see:
>
> a) Support for all functionality of lwIP 1.3.0 (including ethernet, PPP,
>    IPv4, IPv6, raw API, sequential API, BSD socket API)
>   

Well, I think we might probably work with the CVS version as the 1.3.1 
release is coming along. The only problems I see is with PPP. In the 
current state it's very hard to support both the sequential (threaded) 
and raw (non-threaded) modes. Might be a good opportunity to clean it up 
and also commit it to the lwIP project.

> b) Compatibility with eCos applications using the existing eCos lwIP
>    1.1.1 package if possible (API and existing CDL option names
>    preserved)
>   

Hmm, I didn't really focus on that. I agree that CDL names should be 
identical as far as possible. Otherwise I'm not sure (initialization 
etc.) if this really matters as long as it's documented well.

> d) Absolutely minimal mangling of the lwIP sources (it should be easy to
>    upgrade lwIP again in the future)
>   

Mangling is very minimal for these exact reasons, except the PPP sources 
which were changed quite a bit.

> e) All lwIP configuration points accessible via CDL options
>   

Pretty much done I think.

> f) DocBook (.sgml) documentation which describes any eCos-specific
>    aspects of the stack and otherwise points to generic lwIP
>    documentation
>   

I agree. No documentation in my current port.

> g) Any fixes necessary in the lwIP sources contributed up to the master
>    lwIP project for inclusion in the next generic release
>   

I agree. Again, PPP might be the biggest part here.

> h) eCos test cases for all functionality
>   

I have already ported some tests.

> Perhaps the best way forward is for John Eigelaar to take Simon
> Kallweit's package, work on the sequential API initially and post his
> revised package for review and further work by others. Simon, is the
> lwIP package in your repository ready for handoff?
>   

I think we should first discuss my port a little and see if it needs to 
be changed to fit the needs of others.

The sources in my git repository are what I currently use in my project. 
Anybody willing to work on it may just branch my tree.

Simon