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000101_news@watsun.cc.columbia.edu _Wed May 26 16:52:54 1999.msg
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From: "Mr. Scott" <scott_davis@my-deja.com>
Subject: Re: kermit process hangs around after terminal disconnect
Date: Wed, 26 May 1999 20:20:09 GMT
Organization: Deja.com - Share what you know. Learn what you don't.
Message-ID: <7ihl1n$asf$1@nnrp1.deja.com>
To: kermit.misc@watsun.cc.columbia.edu
>From the standpoint of the Unix side of the connection everything is
>perfectly fine. It has not received any data in a long time but there
>is no requirement that it ever receive any data. Nor has it tried to
>send any data therefore as far as it is concerned everything
>is ok
Hmmm, perhaps I had better study the TCP protocol better.
I thought it was the nature of the TCP protocol to maintain
a "connected" state through the (invisible to the socket programmer)
use of some sort of "keepalive" packets. If the keepalive packets
don't arrive after a time, the connection is deemed lost. That was my
impression. So although no application data is needed or expected in
either direction, the lack of keepalive messages should still flag the
telnetd that the connection is no longer active and therefore notify
the terminal driver to cleanup the session. Again, that is only my
impression of how it works. Do you have anything to add?
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