From: Jason Jordan
Date: Fri, 14 Jul 2006 04:27:40 -0400 (EDT)

Hi Gavin,

Over a year ago I more or less did the same thing you did, which was to
analyze the Navini packets as best as I could.  After putting in many
hours over several days, I had most of the statistics figured out.  My
data looked very similar to Matt's data as seen on your webpage.
However, some things (such as overall S/N ratio, distance to BTS, etc.)
still escaped me.

Then I had the idea of trying to decompile the jar files in the Navini
distribution.  I wasn't optimistic it would work, but within minutes, I
was staring at the algorithms used to calculate all statistics.  Victory!

This should give you (and others) a huge jump on an open source tool.  I
have some custom monitoring software, but it is strictly home-brew and
nowhere near release quality.

Anyway, here's how I did it:

1. Install Navini Diagnostics somewhere, say /usr/local/navdiag

2. Install Jad:  http://www.kpdus.com/jad.html

3. Create a directory to hold the source files:

  % mkdir /path/to/navdiag_source                                                                                                                                                  
  % cd /path/to/navdiag_source                                                                                                                                                     

4. Unzip the class files from the following jar files:

  % unzip -d ctl /usr/local/navdiag/data/lib/ctl.jar                                                                                                                               
  % unzip -d navDiag /usr/local/navdiag/data/lib/navDiag.jar                                                                                                                       

5. Decompile the class files:

  % mkdir decompiled                                                                                                                                                               
  % find ctl -name '*.class' | xargs jad -r -d "decompiled/ctl"                                                                                                                    
  % find navDiag -name '*.class' | xargs jad -r -d "decompiled/navDiag"                                                                                                            

That's it.  Now go digging around the decompiled subdirectory for the
goods!  It's been a long time since I've looked at these files, but let me
know if you have any questions, and I'll do my best to answer them.  :-)

Have fun,
Jason