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Re: [PATCH] --ttl and connect() scans (and traceroute?)
From: "Kris Katterjohn" <katterjohn () gmail com>
Date: Sun, 14 Oct 2007 10:04:52 -0500

On 10/14/07, Eddie Bell <ejlbell () gmail com> wrote:

I'm not sure about the portability of setsockopt but it looks like
IP_RECVTTL/IP_RECVERR don't works on STREAM sockets, only DGRAM. So it
may be possible to do this with udp but probably not any other
protocols.

I don't have proper internet access till Tuesday so will check this
out in a little more detail then (and all the other nmap happenings
that have occurred whilst I've been internet-less)

thanks
- eddie


If by portability you mean "across systems" and not "STREAM vs DGRAM", it
looks like Nmap uses setsockopt (without #ifdef or anything) for setting
SO_LINGER, and for IP_HDRINCL (like my patch with #ifdef) among others.

Or maybe you meant setsockopt options rather than the actual call?

Either way I hope you can easily use setsockopt to enable traceroute with
connect() scans because that'd be cool :)

Thanks,
Kris Katterjohn

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