[dosk]

23 years earlier https://marek.terminus.sk/prog/hawkh.tgz

homepage https://marek.terminus.sk/prog/hawkh.shtml

[metadat]

Marek's achieves it without socat, using only cat and sh built-ins. Badass OG.

[arpa]

a small nitpick - it uses inetd, which actually handles the network stuff allowing you to work on stdin/stdout. At least that's what i remember from 2003(?) when i wrote an identd for conntracked connections in bash.