Re: [lwip-users] ERR_ABRT: Out of pcbs or netconns

[Terry Barnaby]

On 11/04/2019 08:33, tirmalabenikasibeni wrote:
> Hi all,
>
> I am developing a MODBUS Server which can serve multiple clients
> simultaneously, using LwIP 2.0.3 & netconn and FreeRTOS 9.0.0 and
> STM32H743BI.
>
> A client (my pc in this case) can connect the server with no problem. When
> disconnected and connected again there is no problem also, but if it tried
> to connect 3. time, connection can't be established and netconn_accept
> returns ERR_ABRT.
>
> This is a part of my lwipopts.h:
>
>
> And my thread and handler:
>
>
>
> Please forgive me if I waste your time, but I am struggling for a couple of
> days.
>
> Thank you!
>
>
>
> --
> Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html
>
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I know its pseudo code, but in your modbus_handler() thread function do 
you actually break out of the while(TRUE) loop and call netconn_close() 
and netconn_delete() when the remote client disconnects ? (I'm not sure 
if both netconn_close() and netconn_delete() are needed). If not the 
available connections will be used up after a time.