I am trying to figure out how to make the echoserver/echoclient work with UPD and DTLS. I took the echoerver (tcpserv04.c) and replaced two lines of code with what I hoped would make it work with UDP and DTLS.  The lines I changed are as follows:

original line:
if( (ctx = wolfSSL_CTX_new(wolfTLSv1_server_method()) ) == NULL)

changed to:
if( (ctx = wolfSSL_CTX_new(wolfDTLSv1_server_method()) ) == NULL)

and

original line:
listenfd = Socket(AF_INET, SOCK_STREAM, 0);

changed to:
listenfd = Socket(AF_INET, SOCK_DGRAM, 0);

When I try to run the server, I get
Listen error: operation not supported

Is there a particular method I should be calling or not calling? Anyone who can give any help on this I would greatly appreciate it.

Doug

P.S. By the way, I did use --enable-dtls when I configured the wolfSSL embedded SSL library.