Re: [lwip-users] Tcp retransmission with pppos using lwip 2.0.3

[address@hidden]

Are you running over pppos or not? Why did your remove "pppos" from the 
2nd mail?

On 01.02.2018 12:49, Kiran wrote:
> Hi,
> I'm using lwip 2.0.3 with freertos.
> I'm running tcp server in my Linux pc and tcp client on atmel
> microcontroller with lwip 2.0.3.
> I got succeeded in establishing a successful tcp connection with my Linux
> pc,but when I start sending tcp messages from client using *send* function I
> see it stops sending after 1  or two minutes always.
> I observed that it is clubbing all the messages and try to continuously
> retransmit.please help me fixing this issue.

Things like this have *very very* often been the result of invalid 
multitasking in the lwIP core functions. Less often but on second place 
are buggy drivers.

Try reading the docs (especially "Common pitfalls", see 
http://www.nongnu.org/lwip/2_0_x/pitfalls.html, does anyone having 
problems ever read this?) and see if you have buggy code running.

To check multithreading problems semi-automatically, upgrade to latest 
git master and use LWIP_ASSERT_CORE_LOCKED() - check the existing ports 
in contrib/ports for examples of how to setup these checks with your OS.


Simon