Sure, you just need additional threads. Note: accept is a blocking call so the thread that runs in (i.e. your server side will block until a packet is received). You can write a polling loop using select, that doesn't block. The cleanest thing to do is have a thread for client(s) and one for server. I have done this with C++17 with TLS1_3_Client and TLS1_3_Server classes with accept loop member functions started as std::thread.
----- Phillip Neumiller Platform Engineering Directstream, LLC -- Sent from: http://openssl.6102.n7.nabble.com/OpenSSL-User-f3.html
