Ethereal-dev: Re: [Ethereal-dev] Packet reassemble problems

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From: ronnie sahlberg <ronniesahlberg@xxxxxxxxx>
Date: Thu, 16 Feb 2006 18:23:42 +1100
Can you use tcp_dissect_pdus() ?
 
This helper function will usually do all the dirty work required to reassemble PDUs for protocols running atop TCP.
 
It will also, even when reassembly is not enabled,  do nice things like keeping track of where PDUs start/end in the sequence number space so that it can also dissect PDUs that are not aligned to the start of a segment.
 


 
On 2/16/06, Martin Warnes <martin@xxxxxxxxxxxxxxxxx> wrote:
Hi list,

I'm having some difficulties with reassembly for a protocol that runs
atop TCP and despite having read the developer notes on the topic and
looked at some of the other dissectors that use reassembly I still can't
fathom out what the problem is.

The protocol in question can span multiple packets, the first packet in
the sequence contains a header with the total number of bytes. The
second and subsequent packets in the sequence contain  no header
information so the only method available to combine the packets is the
byte count from the first header.