Re: [94] [Libbt-devel] trackerless support

[<ke...@an...>]

Just dug through the Beta code with the following impact on the P2P 
protocol:

During negotiation the last bit of the reserved bytes is set like so:

 00 00 00 00 00 00 00 01

This indicates support for the PORT(9) command in the P2P protocol.
The PORT command is sent following connection negotiation on outbound
connections only, and only when the remote peer has indicated the 
capability.  When sent, PORT indicates the call-back port number 
where this client can be reached in the event of a disconnection (the
listening port number, or the forwarded port number if behind a NAT.)

On receipt of a PORT message a peer adds the contact to the list of 
available contacts per the UTKhashmir distributed hash table.

Adding to the hash table is done by sending a Ping via UDP message to 
the host in question, and awaiting a Pong response.  This part of the 
protocol is completely new and unrelated to either the BT P2P protocol,
or to the BT tracker protocol.

Cheers,
-kls

On Thu, May 19, 2005 at 09:38:28AM -0700, ke...@an... wrote:
> Hi Oliver,
> 
> If you have a reference for the protocol spec, please forward it to the
> list.
> 
> Cheers,
> -kls
> 
> On Thu, May 19, 2005 at 09:50:20AM +0200, oliver wrote:
> > Some might allready have read about it, but the bittorrent protocol has
> > just been updated to add trackerless support.
> > (http://www.bittorrent.com/trackerless.html)
> > 
> > First it was Azureus and now also the official bittorent client. Will
> > this feature be implemented in libbt aswell?
> > 
> > 
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> -- 
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> 	  
>           //                               .--=,
>  .....::://::::::::::::::::::::::::::::.. (o O &           ke...@an...
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>  :::::://:::://:/:|//'/' // _,|'         r ,  'qk   
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>                                    kls   \_/-=\_/
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> 
> 
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-- 
Look ma, no threads[1]. 
[1] BitTorrent in C is http://www.sf.net/projects/libbt
	  
          //                               .--=,
 .....::://::::::::::::::::::::::::::::.. (o O &           ke...@an...
:::::::://:::://://://:/:://::||_//       / V  K   
 :::::://:::://:/:|//'/' // _,|'         r ,  'qk   
  :'''/____ // /  //  |_// // ||        .'~.  .~`, 
                                   kls   \_/-=\_/