Ethereal-users: Re: [Ethereal-users] Ethereal Top Talkers - Other reporting info?

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From: Guy Harris <guy@xxxxxxxxxx>
Date: Mon, 13 Jan 2003 11:02:28 -0800
On Mon, Jan 13, 2003 at 04:09:32PM +0000, spamcontrol2@xxxxxxxxx wrote:
> I still would like to be able to place the response time fields within the
> summary/packet list for quicker reference as I scan a trace (it will slow me
> down otherwise, and I'm usually not looking for a particular response time). 
> There's no way to do this using the Preferences->Columns dialog?

The only way to do so involves writing code.  You'd have to add a new
column type (there is a fixed set of things you can put into columns)
*AND* you'd have to modify the dissectors that generate those times to
fill in columns of that type.

> And, from what I can tell there's no easy way to measure response-to-call
> times (what I've been calling "client idle times", though I know that's a bit
> misleading), at least with NFS/RPC and CIFS, correct?

It's not as easy as call-to-response times, given that, for
call-to-response times, you take the time between a call and a matching
response, but there's no notion of "matching" here, just a notion of
"from the same client to the same server" - which could be tricky if the
requests and responses are going over a connectionless protocol such as
UDP and requests go to one of the server's addresses but replies come
back from another of those addresses.  That could be done using the
conversation set up for ONC RPC over UDP.  For connection-oriented
protocols, you might have to worry about multiple connections, though,
if the client opens multiple connections to the server.