Wireshark-dev: Re: [Wireshark-dev] Help with dissecting data spanning multiple packets without

From: wsgd <wsgd@xxxxxxx>
Date: Fri, 23 Oct 2009 17:38:13 +0200
Look at http://anonsvn.wireshark.org/wireshark/trunk/doc/README.developer
2.7.2 Modifying the pinfo struct.


Olivier


Jarolin, Robert a �crit :

I am working on a dissector for dissecting character string oriented TCP messages. The messages are of variable length with no header specifying the length. The message is considered finished when a '\n' character is found. These messages may span multiple packets as well as have multiple messages in 1 packet.

I have only written dissectors that have header info that can be used to return a length value for tcp_dissect_pdus to handle the fragmentation. Since I cannot determine the length until I find a '\n' character, how can I dissect these message types?

Is there a way to parse a packet, get to the end of the packet, then realize you need to continue the current dissection with the next packet? If so, how?

Thanks for any help!


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