Re: [lwip-users] ARP message stops TCP?

[Mike Rosing]

Thank you - I have not seen that page.  I will check into that.

I did change the delay time between messages from minutes to seconds, and then the system works fine.  I have also tried a completely different approach using UDP only, and LwIP works fine, Linux fails to receive what LwIP sends.  So I think the problems I have are not on the LwIP side. 

I do think the call backs are inside the interrupt, but the total time is 10's of microseconds and the system response time is milliseconds, so it should not be an issue.  But it is easy enough to measure and double check.

At this point I think LwiP is pretty solid.  Now that I understand how it works it is more robust than the rest of my system!

Mike

On July 20, 2017 at 2:07 PM "address@hidden" <address@hidden> wrote:

Mike Rosing wrote:

I have a strange problem where raw API LwIP (2.0.2) seems to work most of the time but appears to randomly stop.  So I put wireshark up and looked at the messages between LwIP and the server it was talking to.

From the description of your program, it sounds like your problem could well be that you're violating lwIP's threading requirements.
Have you read the documentation on how lwIP must be used (e.g. http://www.nongnu.org/lwip/2_0_x/pitfalls.html)?

Simon

 

> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users