dht-node

BitTorrent DHT node.

This is a Rust library and standalone client for Mainline DHT. (BEP-0005)

It supports IPv4, IPv6, and multiple identities sharing one UDP socket per address family.

It uses Bendy for bencode serialization/deserialization.

A few improvements can still be made:

• Old/stale node storage.
• Sending announce_peer requests.

The routing tables are stored in JSON files in the working directory as: rt-v4.json and rt-v6.json

Usage: dht-node <bind-address>... [node_id] [--public-ipv4 <ip>] [--public-ipv6 <ip>]

eg. dht-node 0.0.0.0:6881 [::]:6881

Node IDs (BEP-0042)

If no node_id is provided, a random node_id is used until the public IP is known, then it is replaced with a BEP 42 node_id. IPv4 and IPv6 have independent node_ids.

The public IP is learned from the ip field of DHT responses. It must be reported by at least three different /24 (IPv4) or /48 (IPv6) networks and by a majority of recent reports.

--public-ipv4 / --public-ipv6 set the public IP directly and skip discovery.

A provided node_id is always used unchanged, even if it is not BEP 42 compliant.

Requests from non-compliant nodes are still answered, as BEP 42 requires. They are logged with the client version they report.