There are several implementations of TLS that support DTLS 1.2. Wikipedia has an exhaustive link here.
My reading points to the classic openssl, libressl, boringssl and mbed TLS as viable options. I am only interested in DTLS 1.2 API and nothing more. I have no interest in usage of the API elsewhere.
openssl seems to be bogged down with a lot of old protocol and usage baggage. mbed TLS's implementation approach appears to be good but it rarely figures in any comparison. I wonder why? Is it incomplete in any way?
If anyone has evaluated the above, or any other TSL implementation, purely for DTLS 1.2 API, which one would you suggest?