Re: BUG: nping overflow

[Luis Martin <luis.martingarcia () gmail com>]

Hi Leonardo,

Thanks for reporting this bug. I'll have a look at it as soon as I
can. By the way, thank you for providing so many details and output,
that helps a lot.

Regards,

Luis MartinGarcia.



On Mon, Apr 19, 2010 at 11:36 PM, miniBill <cmt.minibill () gmail com> wrote:
> Version: 0.5.30BETA1 [compiled]
> OS:Ubuntu Lucid Lynx [with a personalized set of packets installed]
>
> How to reproduce:
> =============
> ./nping --udp -p 53 felix.nmap.org
> --wait a few seconds--
> sudo ./nping --udp -p 53 felix.nmap.org
>
> What happens:
> ===========
> The first nping signals a 100% loss [apparently being unprivileged
> means I get no packets].
> The second run gets the packets of the first run [just guessing] and
> goes overflow
>
> What should happen:
> ===============
> Nping should discard the extra packets, or at least shouldn't go overflow
>
> Reproduction difficulty:
> =================
> The glitch appears only when the two commands are given with enough
> time between, but no too much.
> I empirically suggest waiting a few seconds [6/8 seems a good choice].
> If it doesn't do the trick, try again [it may happen the 5th, or 6th
> time, or even after].
>
> Logs:
> ====
> [Note: if you want them copied elsewhere, just ask]
> First logs, command line included in the file:
> http://dl.dropbox.com/u/4305382/nmap-logs.txt
>
> Second logs, with --debug, generated by this [it worked the 10th/11th
> time, so if you wanna try it be patient (and enable passwordless sudo
> XD)]:
> ./nping --debug --udp -p 53 felix.nmap.org | tee firstrun && sleep 8
> && sudo ./nping --debug --udp -p 53 felix.nmap.org | tee secondrun
> http://dl.dropbox.com/u/4305382/firstrun
> http://dl.dropbox.com/u/4305382/secondrun
>
> Hope this helps.
>  Leonardo
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