[lwip-users] How to send to netconn socket while waiting for input?

[ddbug]

I have a simple netconn socket server on freeRTOS.
It reads request from client and sends reply in same thread. This works
fine.

Now I have requirement to send to the same client socket from other thread,
while the server thread waits on netconn_recv().
Any examples available for in this case? 
Is TCPIP core locking needed? 

Sorry for a silly beginner question, but could not find any clear answer in
the FAQ. 

My LwIP version is 2.0.3.

ddbug




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