- Deprecate pathset, smashed into PathBuilder (renamed to PathHandler)
- Re-abstraction of sessions and PathHandlers
- Renamed PathBuilder -> PathHandler to more accurately reflect purpose
- {Service,Exit}Handler will remain as PathHandlers, though currently no path-sharing amongst sessions being managed is to be implemented. Handlers will maintain their own paths for both lookups and initiating sessions, while sessions will manage their paths independantly.
- Session object handling necessitates the differentiation between outbound and inbound sessions. Initiators of sessions are entirely responsible for dictating the chosen path on which the session communicates, and must therefore continually build and manage paths for the negotiated session.
- Outbound sessions are now {Service,Exit}Sessions
- Inbound sessions are implemented with InboundSession, which is agnostic to the type of service being operated locally (service vs exit, client vs relay, etc). When the Session initiator signals a switch to a different path, it will be assigned to the InboundSession object by {Service,Exit}Endpoint, which manages local services and exits
Lots of code was using 32-byte nonces for xchacha20 symmetric
encryption, but this just means 8 extra bytes per packet wasted as
chacha is only using the first 24 bytes of that nonce anyway.
Changing this resulted in a lot of dead/dying code breaking, so this
commit also removes a lot of that (and comments a couple places with
TODO instead)
Also nounce -> nonce where it came up.
- RemoteRC supplants most of the functionality throughout the code of RouterContact
- Next step will be to sort out CI issues, then see if we can get rid of either LocalRC (and therefore RouterContact entirely)
- Get rid of CryptoManager.
- Get rid of Crypto.
- Move all the Crypto instance methods to llarp::crypto functions.
(None of them needed to be methods at all, so this is simple).
- Move sodium/ntru initialization into static initialization.
- Add llarp::csrng, which is an available llarp::CSRNG instance which is
a bit easier than needing to construct a `CSRNG rng{};` in various
places.
- Various related small simplifications/cleanups.
