Nmap Development: Re: nmap XML output - host latency

[David Fifield <david () bamsoftware com>]

On Tue, Nov 03, 2009 at 10:35:54PM -0800, Fyodor wrote:
> On Fri, Oct 30, 2009 at 02:25:53PM +0800, Andrew Smith wrote:
> > Hi there,
> >
> > I notice that nmap's standard output provides the latency for each host:
> >
> > Nmap scan report for 192.168.2.1
> > Host is up, received arp-response (0.0057s latency).
> > MAC Address: 00:1C:DF:E3:9F:03 (Belkin International)
> >
> > However the XML output does not provide the host latency:
> >
> > <host><status state="up" reason="arp-response">
> > <address addr="192.168.2.1" addrtype="ipv4">
> > <address addr="00:1C:DF:E3:9F:03" addrtype="mac" vendor="Belkin 
> > International"
> > <hostnames>
> > </hostnames>
> > </host>
> >
> > I have tried increasing both the debug level and verbosity but the host 
> > latency isn't included in the output.
> > I can always parse the output of the standard nmap output to get the 
> > latency, but would prefer to parse the XML.
> >
> > Would it be possible to include this in the XML output?
> Hi Andrew.  I agree that the XML output should have all the useful
> information you find in the normal/interactive output (and then some).
> So I added this task to the Nmap TODO:
>
> o We should print host latency (when available) in the XML output, as
>   suggested at http://seclists.org/nmap-dev/2009/q4/215.
>   docs/nmap.dtd will have to be modified accordingly, and you might
>   even consider adding support to docs/nmap.xsl.
>
> But just adding the task won't make it happen!  If someone wants to
> step up to the plate and write, test, then send a patch to nmap-dev,
> please do so!  This should be a pretty easy one.
We already have an element for latency, but it seems it is not written
for ping scans. "nmap -oX - -F scanme.nmap.org" prints

<times srtt="68616" rttvar="20892" to="152184" />

but "nmap -oX - -sP scanme.nmap.org" doesn't print it. I think this is
just an oversight because there are two separate places where host
output can be written depending on whether anything happens past a ping
scan. I agree it would be easy to fix and a good project for a beginner.
The source file where host output is written is nmap.cc.

David Fifield
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