On Wed, Apr 1, 2009 at 1:35 PM, Owen K. <owenkor...@comcast.net> wrote:
> In order to view this, you will need to open in Wireshark, go to Edit,
> Preferences, Protocols, select Frame, then Treat all frames as Docsis
> frames.
>
> You should see 4 DHCP messages... just change all UDP ports (bootpc) to
> 68... you should see a combination of port 67 and port 68.  Just set
> everything to port 68.

The problem is your pcap claims it's straight ethernet (DLT_EN10MB),
and tcprewrite isn't smart enough to do the Docsis trick to parse the
docsis header and find the start of the ethernet header.

Even if your pcap was some kind of Docsis DLT type, tcprewrite
wouldn't know how to handle it anyways since it doesn't know anything
about Docsis.

It wouldn't be a lot of work to add docsis support relatively
speaking, but I don't know when I would have time to do so.

-- 
Aaron Turner
http://synfin.net/
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little
temporary Safety,
deserve neither Liberty nor Safety.
    -- Benjamin Franklin

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