Re: [lwip-users] UDP broadcast not working - Socket API

[Daniel Berenguer]

Hi Kieran,

I verified that unicast doesn't work either on my platform. Neither
receiving nor sending. I've tried with both BSD and Raw API's.

The author of the examples has sent me his lwipopts.h file and he
doesn't remember having done nothing special for his AVR EVK1100
board. Anyway, the new lwipopts.h changes nothing on the UDP side.

I'm now going to ask the same question in the FreeRTOS forum, just in
case that this issue has to do with the implementation of lwIP for my
platform. I'll come back with the results.

Thanks again,

Daniel.


2009/6/19 Kieran Mansley <address@hidden>:
> On Fri, 2009-06-19 at 15:50 +0200, Daniel Berenguer wrote:
>> Thanks Kieran for your reply.
>>
>> I'm using lwIP 1.3.0 and I successfully built and ran the demo that
>> came with FreeRTOS, a basic http server. I can now display a simple
>> web page through lwIP.
>
> Would be interesting to see if a simple UDP unicast app worked.  i.e. Is
> it UDP that isn't working, or broadcast that isn't working, or something
> else...
>
>> this is my complete lwipopts.h code:
>
> Looks OK to me.
>
> There was a bug concerning UDP broadcast recently:
>
> [bug #26309] Implement SOF_BROADCAST
> https://savannah.nongnu.org/bugs/?26309
>
> but I think that was to do with receiving UDP broadcast frames rather
> than sending them.
>
> It might also be worth contacting the authors of the example you're
> using to see if there is anything special that is required to get it to
> work.
>
> Do you have any kind of debugging tools available on your lwIP device?
> The quickest way to get a solution to your problem would be to trace
> through the stack and see how far your packet gets.  Once we know where
> it is dropped, the solution should be much easier.
>
> Kieran
>
>
>
>
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-- 
Daniel Berenguer
http://www.usapiens.com
http://www.opnode.org