[lwip-users] TCP retransmissions and some general questions

[Matthias Weisser]

Hi

Today I found some time to do some deeper testing of my lwIP port. I used 
wireshark and tested around a bit.

The first thing I saw that there are TCP retransmissions from time to time. 
These retransmissions happens about 5-10ms after the original packet was 
transmitted but not for every packet. That seems a little to early to me.

Another question is about the TCP window size. Which value makes sense together 
with all the other options in the lwipopts.h? Maybe its worth to write a little 
bit more about these options and how they depend on each other.

Another point is about mailboxes. I implemented them as FIFOs but how deep 
should this FIFOs be? I use 32 entries now but is this enough?

At the end I have to thank all the developers of lwIP for this nice piece of 
software.


Matthias