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Writing Wireshark Plugins in C

tags: n900, wireshark, phonet, isi, c 2010-10-05 02:38 by sre

After some time writing the phonet dissector for wireshark in lua I noticed the disadvantages:

wireshark’s lua interface is incomplete
it can’t be properly installed
C is much faster
I can’t reuse any code

So I tried the C interface. I found the basic structure for plugins pretty fast in their documentation and thought about some design changes in the plugin:

usage of tree’s (e.g. all data is below “Message”)
usage of dissectors for the individual resources
one file per resource
usage of expert-info, for broken packet length

Writing Wireshark Plugins

tags: n900, debian, wireshark, lua, phonet, isi 2010-08-26 01:10 by sre

In the last days I finally got some bits out of the Nokia N900’s modem on Debian without any properitary tools. For now it’s just the following information:

manufacturer: "Nokia"
model: "Nokia N900"
revision: "V ICPR82_10w08 25-02-10 RX-51 (c) Nokia"

But the most difficult part is probably done. My next plan was to get the modem connect to a mobile network, which requires an unlocked SIM card. Unfortunately ofono does not yet support SIM cards with PINs. Thus I had to find another way to get out how to perform this task.