[ih] Early sockets discussion paper

[Jack Haverty]

FYI, for TCP on Unix:
	- there was no TCP V1 implementation
	- there was a TCP V2 implementation (I personally did this one) based
on the prior LSI-11 MOS TCP done at SRI; the TCP was itself a user
process, and other processes interfaced to TCP through Rand ports
	- there was no TCP V3 implementation (V3 had a very short life)
	- there were multiple TCP V4 implementations: my V2 implementation was
evolved to do V4; Mike Wingfield did PDP-11/70; Rob Gurwitz did the Vax;
John Sax did the HP-3000
	- BSD TCP came after all of these

Also, the user interface to TCP was explicitly not specified in the TCP
definition.  The interface outlined in the spec was presented as an
example only.  We did this explicitly because there were so many
different machines and OSes and languages at the time that a standard
mandatory API was not reasonable.

IIRC,
/Jack

On 11/30/2017 10:35 AM, Noel Chiappa wrote:
>     > From: Joe Touch
> 
>     > I've always wondered about the chicken-and-egg issue of BSD sockets
>     > vs. the interface defined in the early TCP specs.
> 
> ?? See below...
> 
>     > Does anyone happen to know whether TCP v1, v2, or the split TCP/IP v3
>     > variants that preceded the current v4 had the same interface spec
> 
> Without checking to be sure (and it's been a _long_ time, so don't put much
> weight on this), I think they were (modulo changes to the protocol, e.g.  EOL
> changes). But the docs are out there, it would not be too hard to check.
> 
>     > and the direction of influence (TCP to BSD or the converse)?
> 
> BSD _long_ post-dates the TCP spec.
> 
>     Noel
> 
> 
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