According to my experiment, if "sever hello done" is before "server hello", the dtls client would stop replying any message when it goes to connectstate HELLO_AGAIN_REPLY, the neededState is set to SERVER_HELLODONE_COMPLETE, in the mean while server is retry to send those message again and again...
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ReferencesStable Releases - download stable product releases.
Development Branch - latest development branch on GitHub.
wolfSSL Manual - wolfSSL (formerly CyaSSL) product manual and API reference.