I am sorry if the question was already asked, but I cannot find something similar.
I have created LwIP_UDP_Echo_Server example for STM32H735G-DK, and after some efforts it works. So far so good.
Now I am porting the code to my actual project. I am stuck on the udp_echoserver_receive_callback that includes the following sequence
udp_send(upcb, p_tx);
udp_disconnect(upcb);
pbuf_free(p_tx);
Is it safe to disconnect and release the buffer without any delay? LWIP documentation defines udp_send as non-waiting; therefore, immediate disconnection and buffer release looks like races with uncertain result.
Related question: is it possible to check if udp_send actually finished sending the data?
