[bittorrent] Encryption, Azureus Extended Messaging and reserved bits...

Alan McGovern alan.mcgovern at gmail.com
Mon Sep 11 02:50:38 EDT 2006


Perfect! With a little googling i managed to come across this:
http://www.bittorrent.org/Draft_DHT_protocol.html which (at first glance)
looks like it might be detailed enough to implement the protocol.

I'm sure i'll be back to complain and moan about documentation if it isn't
;)

Thanks,
Alan.

On 9/11/06, Nikitas Liogkas <nikitas at cs.ucla.edu> wrote:
>
> Regarding the DHT implementation, I believe the widely accepted one is
> Kademlia. The mainline client in particulat uses a Python
> implementation of Kademlia called Kashmir.
>
> I don't have any answers for any of your other questions though :)
>
> nikitas
>
> On Sun, 10 Sep 2006, Alan McGovern wrote:
>
> > I've completed a C# based bittorrent library, and i've been busy
> extending
> > it to support the fast peers extensions (complete-ish for the moment)
> and
> > implementing the connection Encryption methods. Now, the problem i'm
> coming
> > across is that there is no listing of what each bit in the reserved 8
> bytes
> > is currently being used for, so I'm at a loss for finding out if a
> remote
> > peer does support Encryption/Extended Messaging, i don't even know how
> to
> > advertise that i support encryption/extended messaging.
> >
> > Is there a list somewhere of what bits are currently being used for what
> > purposes? Also, is there anything that's more detailed than
> > http://www.azureuswiki.com/index.php/Message_Stream_Encryption for when
> it
> > comes to actually implementing encryption? What messages need to be
> passed
> > to and from the peers. From what i was able to figure out from extensive
> > googling is that the handshaking procedure is greatly modified for the
> > encrypted connections. Is it a case of assuming that encryption is
> enabled
> > and then retrying the connection if it fails?
> >
> > For Peer Exchange, i can't seem to find anything which explains how this
> is
> > supposed to be implemented. Are there any documents available anywhere?
> >
> > Lastly, there are competing DHT implementations out there. What ones are
> > documented? Which one is recommended to use? I can't find documentation
> for
> > either of them, and i *really* don't want to have to resort to examining
> > python/java code.
> >
> > Thanks,
> > Alan
> >
>
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