[Zenmap] patch for log-scale radius on Topology tab

[Daniel Miller <bonsaiviking () gmail com>]

Hey list,

I ran into an issue viewing the Topology tab of a scan of our local 
network where a few hosts had firewalls, leading a -sU scan to produce a 
large number (~1000) of open|filtered ports. This made for an unusable 
topology, since the radius of these hosts was enormous (~500) and 
covered all the other hosts (see attachment "original.png").
So I developed a patch which uses a logarithmic scale for the radius, 
specifically radius = BASE_RADIUS + 4 * ln( open_ports ). This is much 
more usable, and still gives an idea of the number of open ports (see 
attachment "log_scale.png").
I was still not satisfied, however, since these very secure, firewalled 
machines were showing up as large red circles. So I hijacked the 
calculation of the poorly-named "number_of_scanned_ports" property and 
changed it to ignore open|filtered extraports (I copied the same 
algorithm used by 
zenmapCore.NmapParser.HostInfo.get_port_count_by_state, so results 
should otherwise be the same). For the final view, see attachment 
"both_changes.png." The 3 offending hosts are now small green dots, as 
they should be. Thank you for your consideration.

Dan

Attachment: logradius.patch
Description:

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