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hex4def6 n00b
Joined: 13 Mar 2004 Posts: 39 Location: Pleasanton, CA
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Posted: Tue Jun 26, 2007 6:07 pm Post subject: Wireshark filter question |
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Hi,
I'm trying to grap RSSI values out of captured packets using wireshark (actually, tshark), but I don't understand how to set up filters that well:
currently I'm using a hackish method:
tshark -i ath0 -V | grep RSSI
but I'd like to set up a filter instead. I've discovered something called prism.rssi.data, which I think is what I need. How would I use that as a filter?
Thanks _________________ The following sentence is false. The preceeding sentence is true. |
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no_hope Guru
Joined: 23 Jun 2003 Posts: 482
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Posted: Tue Jun 26, 2007 7:33 pm Post subject: |
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AFAIK you can't tell tshark to only output RSSI values or any other field alone. The purpose of filters is restrict the set of displayed packets (e.g. just show frames with RSSI > 50), not to specify which fields to display.
You can use -V and -x flags to control verbosity, that's all tshark will do for you. |
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