DHT only used for get_peers

[NielsZeilemaker]

If we can expose the DHT of LibTorrent we can remove our DHT implementation. Only a get_peers method is required.

After, we can redirect the miniswarm get_peers request and the DHT libswift node to use the libtorrent DHT instead.

[whirm]

Ill try to get an answer from the libtorrent developers if such patch would be accepted.

[egbertbouman]

We now require that we can manually do a DHT announce for hidden services, so we can't remove pymdht yet.

[LipuFei]

@NielsZeilemaker @egbertbouman @whirm @synctext I guess this one can be closed.

[NielsZeilemaker]

Why? Is the pymdht already removed?

[LipuFei]

@NielsZeilemaker Not yet.

[whirm]

@devos50 do you want to take care of this guy?

[ardhipoetra]

Libtorrent has get_peer_info for every valid torrent handle. What's the different between this function and the one in pymdht?

[synctext]

@ardhipoetra Interesting API handle: http://www.rasterbar.com/products/libtorrent/manual.html#torrent-handle

Looks somewhat similar! pymDHT only returns non-validated IP addresses, Libtorrent tries a handshake with them.
Please try if you can download a .torrent file and access the peer info with this Libtorrent API. It initiates uTP handshakes then, so it really measures the swarm size. These calls might not be exposed in the Python wrapper.

[ardhipoetra]

@synctext yes, we can get list of peers using that function. And it's available on python binding.

Test code can be found in This gist

Tested with this and it was okay.

[whirm]

should we move this to an early milestone?

[ardhipoetra]

An update:

in version 1.1.0.0 (the most recent one), there are new function called dht_get_peers providing a swarm's infohash. This can be done without joining the actual swarm. We have to monitor alert to get the peer list.

The bad news is, python binding implementation is not perfect, if I may say. The discussion in arvidn/libtorrent#602 still ongoing till now.

[whirm]

nice, let us know when it gets into a usable state!

[synctext]

update needed op dht_get_peers status in libtorrent and Python wrapper. Few years past since issue was created.

[devos50]

It seems that the get_peers method is exposed in libtorrent 1.1 but as @egbertbouman's comment says, we still require a manual DHT announce. I'm not sure whether that's possible yet.

[aldenml]

@devos50 I think session_handle:: dht_announce is what you are looking for

[devos50]

I guess this issue has been sufficiently addressed.