in reply to RDT1.0 & 2.2 over UDP

UDP is connectionless, so RDT is typically accompanied by RTSP and SDP which handle session control, and RTCP for stream control.

CPAN has a rather old implementation of RTSP-Lite which could be a starting point.

Here is a link for perl IPC documentation that includes socket programming samples.

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In Section Seekers of Perl Wisdom