Re: [lwip-users] Retransmit too quick?

[Sergio R. Caprile]

Again, you should check how you are handling timers in your port.
sys_check_timeouts() needs a consistent time base, it expects you
provide a sys_now() function which returns time in milliseconds.
You should call sys_check_timeouts() from your main loop as frequently
as possible so it does its jobs, it will take care of time by using
sys_now().

Sorry, I can't check/follow your code, you should send the first block
when you need it and following blocks will be sent via the tcp_sent()
callback, check the examples.
And, you should not be freeing pbufs the way you are doing in
echo_recv(), please check the examples and the wiki
http://lwip.wikia.com/wiki/Raw/TCP