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Let's give PRO/VENIX a barely adequate, pre-C89 TCP/IP stack, featuring Slirp-CK

I had this grand idea many moons ago about writing up a TCP/IP stack for the Commodore 64, along with a lot of other people, and several o...

Here's our barebones network stack for PRO/VENIX, the Pro's only official Unix option, downloading the Google home page on real hardware (internal addresses bleeped out) over SLIP and a Crypto Ancienne proxy for TLS 1.3. I'm pretty sure the system I was calling was a terminal server with a SLIP feature, but in olden days the upstream end might have been a utility like slattach which effectively makes a serial port directly into a network interface. Because they synthesize artificial local IP addresses, sort of NAT before the concept explicitly existed, the architecture of such tools prevented directly creating listening sockets — though for some situations this could be considered a more of a feature than a bug.

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