Mainline DHT implementation in Elixir

[Florian Adamsky]

Hello,

I have done a couple of small projects to learn Elixir. So, I am not
completely new to Elixir and its ecosystem. This is, however, my first
non-trivial project. Since, I am doing research in the area of
peer-to-peer (P2P) applications, I thought it would be a good idea to
write a mainline distributed hash table (DHT) in Elixir. You can get the
source code on GitHub [1].

The main functionality is working, but it is not finished yet. I would
like to implement a couple of new features in version 0.2, for instance:

* get faster rid of bad nodes
* rate limiting
* IPv6 routing table
* pure search without announce_peer messages
* more tests

Nevertheless, I would appreciate feedback on the architecture and the
code. You can find a diagram of the architecture also on GitHub.

Regards

[1] https://github.com/cit/MLDHT
--
Florian Adamsky
http://florian.adamsky.it/

[Josh Adams]

have you seen jlouis666's DHT in erlang?  It has the nice benefit that it's been thoroughly quickchecked.

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Josh Adams

[Johan Wärlander]

I was just thinking the same.. Unfortunately, can't say much about DHT implementations beyond suggesting to go have a look at that, even if just to "compare notes".

It's here: https://github.com/jlouis/dht

[Florian Adamsky]

On Monday, Nov 23 2015, Josh Adams wrote:

> have you seen jlouis666's DHT in erlang? It has the nice benefit that it's
> been thoroughly quickchecked.

yes, I have seen this implementation. My erlang is way to bad to say
anything about the code or the implementation. According to its
documentation, however, he implements a more general DHT network which
is not compatible with the mainline DHT network according to BEP
05.

The mainline DHT overlay network is by far the biggest overlay network
with around 15-21 million users per day. This is because BitTorrent
makes use of it. For instance, if you would like to implement a
BitTorrent client or crawler in Elixir you will need a compatible DHT
implementation.

But you are right, it is pretty nice that is been tested with
QuickCheck.

Regards