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I love the IO Graphs feature. I think it's one of those
commonly-overlooked features that, once people discover it, they learn
how immensely powerful Wireshark is.
A friend sent me a packet capture from a wireless network the other day,
wondering why his stations were seeing poor performance. I sent him
this screen-shot:
http://802.11ninja.net/~jwright/wireshark-io-retries.png
Using the display filters "wlan.addr eq <foo> and wlan.fc.retry eq 0"
and again with "... retry eq 1". Looking at this, it's pretty obvious
the issue is PHY-related, since retries are exceeding valid frames at times.
The reason I'm sending this to wireshark-dev is that I'd like to find
out if there have been any plans or suggestions on extending the IO
Graphs functionality to retain the time-scale on X, but change Y to the
value of one or more numeric fields. For example, it'd be great to
graph statistics such as the 802.11 frame transmit rate, RSSI, 802.11
sequence numbers, WEP IV's, etc. I'm sure non-802.11 analysis would
also benefit from this, such as ephemeral UDP/TCP ports, or HTTP
content-length information, etc.
Has there been any thought on implementing this feature? I'm happy to
try my hand at it, but I figured it would be wise to ask before I dive
into something.
Thanks,
- -Josh
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