tcptrace-bugs measuring throughput from syn to fin

From: Stefan Alfredsson (
Date: 10/02/03

Date: Thu, 2 Oct 2003 17:03:27 +0200
From: Stefan Alfredsson <>
Subject: tcptrace-bugs measuring throughput from syn to fin
Message-ID: <>


>From what I understand, the throughput is calculated from the
first packet seen to the last packet seen in with the same
addr,port pairs.

Is there a way to make tcptrace only count the time between syn
and fin instead?

In my specific situation, I run experiments over a simulated wireless
link which introduces bit errors.

Sometimes an error affects the port number, and as they are (almost)
sequentially allocated this means that an erronenous packet in an early
connection may be misjudged to belong to a later stream, or the other
way around.

This means that the throughput for a connection may be way off, because
an erroneous packet was determined to be the "first" in the particular

I tried the "-c" flag to only count connections with syn and fin seen,
but the same behavior existed there.



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