alt Hacker NewsA difference between iroh and many p2p networks is that we try to use existing IETF standards (QUIC, TLS) as much as possible instead of reinventing the wheel. An iroh connection is just a QUIC connection, using TLS and TLS ALPNs for protocol negotiation.
If you look at an iroh connection using wireshark, it is just a QUIC connection. You can use all the existing tools, and a lot of things you learn when using iroh transfers to traditional QUIC connections and vice versa.
Most iroh contributors come out of the p2p world, and you could say that we had a bit of abstraction fatigue after working on regular P2P networks for some years.
We have also so far resisted the temptation to write a DHT, opting instead to use the biggest existing DHT, bittorrent mainline, for our p2p address lookup needs. Many traditional P2P networks come with their own implementation of a DHT for discovery.
Note that there are some "regular p2p networks" that use iroh under the hood, e.g. holochain https://blog.holochain.org/dev-pulse-154-holochain-0-6-1-is-... as well as various p2p chat apps.
https://blog.holochain.org/dev-pulse-154-holochain-0-6-1-is-...
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> We have also so far resisted the temptation to write a DHT, opting instead to use the biggest existing DHT, bittorrent mainline, for our p2p address lookup needs. Many traditional P2P networks come with their own implementation of a DHT for discovery.
Bravo, because they always get it wrong.
DHTs used for decentralized DNS-like naming purposes have truly unique scaling requirements; you have to use a connectionless protocol (like bittorrent does) but everybody seems to be fixated on connection-oriented protocols like TCP, HTTP, and QUIC. The latter just don't work for this extreme use case.
No other use case on the entire internet requires such an extremely large out-degree for end-user nodes in the node connection graph. Allocating connection-state, even a very small amount, opens up the least-powerful nodes to easy DoS attacks. And from there it's easy for a motivated attacker to push the network away from decentralization and force it in to a highly-centralized state.
Forgive me if this is an ignorant question, but does your use of the Mainline DHT mean that Bittorrent clients will be responding to P2P address lookups from Iroh?