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From: bc@cyb-eng.UUCP (Bill Crews)
Newsgroups: net.unix-wizards,net.lan
Subject: Re: STREAMS query
Message-ID: <739@cyb-eng.UUCP>
Date: Wed, 9-Oct-85 13:23:15 EDT
Article-I.D.: cyb-eng.739
Posted: Wed Oct  9 13:23:15 1985
Date-Received: Sat, 12-Oct-85 18:23:52 EDT
References: <471@enmasse.UUCP> <1699@brl-tgr.ARPA> <449@cheviot.uucp> <169@ihnp3.UUCP>
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Xref: watmath net.unix-wizards:15182 net.lan:1075

> There is no requirement that STREAMs must implement a virtual circuit.
> -- 
> 						Douglas H. Price

This seems to be a disagreement upon terminology.  If one must set up a
"session" or "virtual circuit" or whatever before being able to send a
packet to the other end, then it is not a datagram service, even though one
may parcel his byte stream into logical units that one might be tempted to
call "datagrams".  If a circuit must be established, it must also be torn
down.  There is state information that must be considered when either party
vanishes.  Depending upon the implementation, the reestablishment of a
virtual circuit may or may not have a problem due to the continued existence
of an existing one that has yet to be properly shut down.

Could you please state YOUR definition of a stream and of a virtual circuit?
-- 
  /  \    Bill Crews
 ( bc )   Cyb Systems, Inc
  \__/    Austin, Texas

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