[bittorrent] Best tool for sniffing BitTorrent messages?

Kirk True kirk at mustardgrain.com
Wed Aug 12 20:51:56 EDT 2009

Hi Harold,

Hmmm... I don't /think/ it's related to encryption as I'm running this 
all on a local setup (clients, tracker, etc.). I created the Torrent and 
specified no encryption and the various properties don't suggest 
anything to that affect. I'll recreate with a plain text file to see if 
I can spot the "watermark" when sniffing the data.

I'll look into the encryption stuff just to be sure.


Harold Feit wrote:
> Trying to sniff while the two clients are running with encryption
> enabled is going to kidney-punch your efforts a fair bit. Whatever
> client you're basing your observations on NEEDS to have the encryption off.
> Kirk True wrote:
>> Hi all,
>> I'm looking at sniffing the requests that various BitTorrent clients 
>> make in order to improve my prototype client. I started off using 
>> Wireshark but I can't get it to reliably recognize BitTorrent messages. 
>> Interestingly the messages my prototype BitTorrent client generates are 
>> parseable in Wireshark while those interchanged between Transmission are 
>> not.
>> So, for Linux, Mac OS X, Windows, what is the best tool for sniffing the 
>> messages that the BitTorrent clients generate? I can use tcpdump, 
>> Wireshark, etc. to see the TCP traffic, but I'd like a tool that will 
>> "understand" the requests and display them as BitTorrent messages.
>> I've got to believe this is possible. I've done this 100 times over for 
>> HTTP, SMB, my own code, etc.
>> Ideas?
>> Thanks,
>> Kirk
>> _______________________________________________
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>> BitTorrent at lists.ibiblio.org
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