Nmap Development mailing list archives

Re: Traceroute failure from SVN 15553 on OSX 10.5.8


From: David Fifield <david () bamsoftware com>
Date: Wed, 23 Sep 2009 21:16:12 -0600

On Wed, Sep 23, 2009 at 11:08:22AM -0500, Chris Clements wrote:
Receiving a failure message when traceroute starts from the following  
command:

nmap -Avv -T5 192.168.0.0/24 (FYI, all machines in this range are on  
local layer 2 subnet)

Failure message:

Initiating Traceroute at 11:07
Stats: 0:02:46 elapsed; 232 hosts completed (24 up), 24 undergoing  
Traceroute
Traceroute Timing: About 1.39% done; ETC: 11:07 (0:00:00 remaining)
Assertion failed: (current_ttl > 0), function next_ttl, file  
traceroute.cc, line 397.
Abort trap

Thank you for this report. Does the attached patch fix the problem? It
may be that OS detection is wrongly detecting a distance of 0 for one of
the hosts (whichever follows 192.168.0.253). The traceroute should
always start with a TTL of 1 at the minimum.

David Fifield

Attachment: traceroute-distance-guess.diff
Description:


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