[ih] Origin of 'talk' command

[Tim Buchheim]

I've found some information on the actual protocol used by talk, if
anyone is interested.

Here's a page which provides some details for both the ntalk protocol
and the older talk protocol.

  http://members.aol.com/chinyu/chitchat/faq-04.html

It doesn't seem to have the constants the for type or answer fields, but
you can find that in /usr/include/protocols/talkd.h (which can be found
on FreeBSD, Mac OS X, and RedHat Linux at least)

Note that while commands (invite/delete/announce/etc.) and responses are
sent in the above format to UDP port 518 (or 517) the actual text is
sent as a raw stream of characters over a separate TCP connection.


-- 
Tim Buchheim