[BitTorrent] Reducing dependency on trackers

Olaf van der Spek OvdSpek at LIACS.NL
Wed Aug 25 16:47:20 EDT 2004


> I think as a measure to increase performance in an environment of
unreliable
> trackers it would be helpful to have messages for requesting/sending lists
of
> peer addresses.
>
> I'm sure this has been proposed before and I know Shareaza is already
using some
> kind of message for that purpose. I intend to add support for messages of
that
> kind for LimeWire. In case you agree, I would like to use one of the
extension
> bits in the BT handshake to indicate support for that message, - otherwise
I
> would just exchange this message among LimeWire nodes.
>
> The message format I had in mind was a PEER_ADDRESS_REQUEST message with
no
> further payload for requesting addresses and a PEER_ADDRESS_REPLY message
> containing a simple list of 6 byte addresses (4 ip bytes in big-endian
order and
> 2 port bytes in little-endian order).

Why little-endian for the port number?
And what about DoS attacks?



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