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[Bug] route_dst_netlink: can't find interface "eth1" (via IRC)
From: Daniel Miller <bonsaiviking () gmail com>
Date: Thu, 14 Feb 2013 16:59:43 -0600


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!).

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