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Nmap Development: Re: [PATCH] UDP --badsum fix

Re: [PATCH] UDP --badsum fix

From: Andreas Ericsson <ae_at_op5.se>
Date: Tue, 23 Jan 2007 16:20:47 +0100

Kris Katterjohn wrote:
> Fyodor wrote:
>> On Mon, Jan 22, 2007 at 12:07:45PM -0800, doug_at_hcsw.org wrote:
>>> Small fix. I was reading the UDP RFC http://www.ietf.org/rfc/rfc768.txt
>> Great catch! Would you apply it to /nmap ? Also, I think the change
>> should probably go into at least the osscan.cc:174 instance below
>> (changing to a decrement should be fine):
>
> I just searched through the other RFCs, and it looks like only UDP has
> this rule. So, yeah, only the osscan.cc should be changed.
>

Search through the various kernel sources instead, and you'll find that
the same holds for IP, ICMP and pretty much every packet-type availabled.
UDP might be the only protocol it's RFC'd for, but it's done for all of
them (on most systems).

-- 
Andreas Ericsson                   andreas.ericsson_at_op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231
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