Hi Martin,
I've been following this thread with interest ... but I'm stumbling
on the solution you sketch.
I'm in IO Graphs, I've assigned the Filter "tcp.analysis.ack_rtt" to
Graph 1, and I see a chart which, for my trace, wanders around an
average value of ~400 for a Tick interval of .1s, ~40 for a Tick
interval of .01s, and ~4 for a Tick interval of .001s Glancing
through the trace ... I might buy the idea that time between ACKs
averages ~40us ...
==> How do I know what units Wireshark is using on the
y-axis?
Alternatively, perhaps you are suggesting a way to produce a CSV
file containing these RTT calculations, from which I could calculate
AVG, MEAN, MEDIAN, etc.
==> But I don't see how to do that, i.e. how to produce a CSV
file listing 'tcp.analysis.ack_rtt' for each ACK.
And perhaps I'm not following you at all
==> Would you elaborate on the analysis technique you
sketched below?
--sk
Stuart Kendrick
FHCRC
On 6/21/2012 3:33 AM, Martin Isaksson
wrote:
Hi,
try the
tcp.flags.fin==1, tcp.stream, tcp.analysis.ack_rtt and
tcp.analysis.acks_frame fields.
Regards,
Martin
so nobody has any idea?
the intuitive idea is to use sequence number/ack number, but it
may be a bit troublesome, any other ideas? thanks
2012/6/20 esolve esolve <esolvepolito@xxxxxxxxx>
Hi,
all,
I want to get round trip time distribution from a pcap file.
My
idea is to compute each round trip time for each pair of data
packets
and ack packets. But the difficulty is to identify the pairs,
namely,
for each data packet(ack packet) I need to find the
corresponding ack
packet(data packet). How can I achieve this?
Besides, for the find tcp tear-down process, how to identify
each
FIN-ACK and ACK pair? thanks!
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