Unix Client-Server Program Interface (1996)

[gandarojin]

http://cr.yp.to/proto/ucspi.txt

[angersock]

CSPI applications don't even have to be recompiled as the Internet upgrades from IPv4 to IPv6.

This being from '96, it's downright sad that two decades on we don't have IPv6 rolled out.

[js2 → angersock]

djb agrees: http://cr.yp.to/djbdns/ipv6mess.html

[gandarojin]

There’s a Debian package for an implementation of the “tcpclient” program: `apt-get install ucspi-tcp-ipv6`. You can also find TLS-enabled versions of the client here: https://github.com/SuperScript/ucspi-ssl (see the links).