[e2e] TCP-based traceroute (was: Detecting middle boxes)

[David G. Andersen]

David P. Reed just mooed:
> 
> I got your reply.  I do indeed think it might be interesting to code it up 
> and try it.  If anyone does, let me know.  I may get around to it sometime 
> if no one else does.
> 
> [ Regarding a "traceroute with TCP packets" ]

Thanks for the reminder.  I wrote such a probe a while ago for use
with some of the RON measurements, and kept meaning to release it.
Seems like as good a time as any:

  http://nms.lcs.mit.edu/software/ron/tcptraceroute.tar.gz

  Tested under FreeBSD and Linux (Redhat 6.2, ought to work
under most versions).  It's not polished software... my apologies.

1061 eep:~> tcptraceroute www.mit.edu
traceroute to www.mit.edu (18.181.0.31), some hops max, some byte packets

 1  18.31.0.1  0.528 ms  0.485 ms  0.532 ms
 2  18.24.10.3  1.083 ms  2.071 ms  5.183 ms
 3  18.201.1.1  7.569 ms  3.165 ms  7.087 ms
 4  18.168.0.21  2.343 ms  1.871 ms  1.881 ms
 5  18.181.0.31  2.735 ms

  You can set the port, the count, the interval, the TCP flags,
and that kind of thing, but not the packet size.  Be sure to see
the -h for use on a multihomed machine;  you might need to explicitly
state your hostname, and the interface to use.

  If you look at the code a bit cross-eyed, it might look a lot
like a TCP-based ping utility... if anyone's interested, I'll release
that one as well.

  Comments, patches, etc., welcomed. 

  -Dave

-- 
work: dga at lcs.mit.edu                          me:  dga at pobox.com
      MIT Laboratory for Computer Science           http://www.angio.net/