Re: nmap-5.20 on x86_64 Segmentation fault

[Kris Katterjohn <katterjohn () gmail com>]

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On 01/25/2010 08:27 PM, Brandon Enright wrote:
> On Mon, 25 Jan 2010 07:37:32 -0600
> Kris Katterjohn <katterjohn () gmail com> wrote:
> [...snip...]
> > > >     Socket troubles: Address family not supported by protocol
> > > >     nmap: nsock_core.c:1163: nsp_add_event: Assertion `nse->iod->sd
> > > > > = 0' failed. Abort
> > > Indeed, Nsock doesn't do IPv6 yet.
> > Odds are I'm misunderstanding the issue (since I didn't receive
> > Gunnar's email quoted here) or I'm not following this correctly, but
> > what do you mean nsock doesn't do IPv6?  Perhaps the assertion
> > failure above was triggered with code utilizing a special part of
> > nsock which doesn't support IPv6 yet, but I just wanted clarification
> > here :)  I know IPv6 is supported in Ncat via nsock, and surely NSE
> > and version detection support IPv6 with it too.
>
> > > Brandon
> > Thanks,
> > Kris Katterjohn
>
>
> Hey Kris, sorry it took me all day to find the time to dig into this.

Hey Brandon.  No worries: I was only almost late for class trying to push this
out, so we're all good ;)  Eh, who am I kidding?  It was just Linear Algebra
so feel free to have me respond another morning :P

> So, specifically for Gunnar's issue, we can't read IPv6 addresses
> longer than 16 characters in /etc/resolv.conf without smashing the
> stack.  We need to fix this but rather than hardcode a buffer of 128,
> David had some better ideas.  I'm happy to code them up but I can't
> remember the name of the IPv6 address max string length constant he
> pointed out to me...

INET6_ADDRSTRLEN in netinet/in.h.  And actually a quick grep yielded this
defined in Target.h as well.  Not sure why that's not in tcpip.h with the IPv4
one also defined there.

> Brandon

Cheers,
Kris Katterjohn

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