Hello,
If you look at "Analyze / Enabled Protocols ...", you have the list of 
protocols known by wireshark.
I do NOT see any Thunder protocol.
It could have another name or simply wireshark do NOT know it.
NB: you can disable a protocol in this window.
If Thunder use the same udp port as OICQ (= 8000 inside wireshark code),
you can see Thunder packets as OICQ packets.
Olivier
Adele a �crit :
Dear all,
 
Here I have a very detailed question and I would like to thank you all 
for your help in advance.
 
Some background information first:
 
Thunder is a very popular P2P file downloading software in China and 
it is not open sourced. Recently I have been doing some protocol 
analysis experiments about Thunder by Wireshark. Experiment 
descriptions are as follows:
 
Experiment 1 :  Close other applications and run Thunder------I will 
get a lot of packets with the protocol name as OICQ. (OICQ is a very 
popular IM soft ware in china but actually during this experiment I 
did not open it).
 
Experiment 2:  keeping all other setting unchanged, I  close Thunder, 
immediately after experiment 1---------Here I did not get any OICQ 
packets anymore.
 
Actually I have talk to some guys who work in OICQ company and 
according to them, Thunder and OICQ are competitors and there are not 
any co-operations between them.  So I am really confused that how I 
can capture OICQ packets from Thunder while the OICQ is not running.  
Therefore, if it is possible, may I ask how  Wireshark works and 
decide a packet is an OICQ packet? I mean, besides of the UDP port, 
are there any other ways for Wireshark to categorise a packet to be an 
OICQ packet?
 
Actually I am really confused here and your help will be really 
appreciated for me.
 
Thank you in advance and best regards,
 
Adele JIA
 
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