wolfSSL has supported the ThreadX/NetX RTOS with the TLS protocol. Recently we added the ability to use DTLS with NetX. Out of the box, wolfSSL has the I/O callback functions for handling UDP packets for DTLS. As an extension to DTLS, wolfSSL also supports Multicast DTLS. If you would like to know more please contact our sales team via email, sales@wolfssl.com