Re: [Bug] route_dst_netlink: can't find interface "eth1" (via IRC)

[David Fifield <david () bamsoftware com>]

On Thu, Feb 14, 2013 at 05:33:21PM -0600, Daniel Miller wrote:
> On 02/14/2013 04:59 PM, Daniel Miller wrote:
> > List,
> >
> > Today, a user came into the #nmap IRC channel with a problem that
> > sounded familiar:
> >
> > > since nmap 6.01 I have not been able to use it on several of my
> > > machines, it can't find any interfaces.
> > > gentoo linux, current stable
> > > kernel 3.6.11, have had issue on both amd64 and x86
> > > issue persists with nmap-6.25
> > > on some machines, I was able to get nmap working by specifically
> > > cmpiling in ipv6 support to libpcap (would have been nice it
> > > that had been a requirement in the configure script)
> > > *anything* trying to scan gives: route_dst_netlink: can't find
> > > interface "eth1"
> > > nmap --iflist gives: INTERFACES: NONE FOUND(!)\nROUTES: NONE FOUND(!)
> > I'm pretty sure that this is due to an appletalk interface (ipddp)
> > on his machine, since he compiled appletalk support into the
> > kernel. I think the fix would be to add another ARP_HDR_ type to
> > libdnet-stripped/include/dnet/arp.h and a matching case in
> > libdnet-stripped/src/addr.c, but I don't know how to come up with
> > the proper value for the constant, nor do I have a test setup.
> >
> > The related threads are: http://seclists.org/nmap-dev/2012/q3/801,
> > http://seclists.org/nmap-dev/2012/q2/886
> >
> > Thanks for any help from devs who know this part of Nmap better
> > than I do (hint, Djalal or David!).
>
> I think I've fixed this in r30610. I found that running "modprobe -a
> ipddp" gave me an AppleTalk interface, and allowed me to reproduce
> the bug. GDB gave me the value that was being reported, and a quick
> patch fixed it. We're in the same state as the Infiniband case, as
> far as I can tell: IP scanning should work, and Nmap won't crash,
> but don't expect more support than that!

Thank you Dan. I was able to reproduce the issue using the same recipe.
Your fix looks correct.

David Fifield
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