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https://github.com/fluencelabs/rust-libp2p
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2 Commits
| Author | SHA1 | Message | Date | |
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Roman Borschel
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58ee13b630
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Fix regression w.r.t. reporting of dial errors. (#1493)
* Fix regression w.r.t. reporting of dial errors. PR [1440] introduced a regression w.r.t. the reporting of dial errors. In particular, if a connection attempt fails due to an invalid remote peer ID, any remaining addresses for the same peer would not be tried (intentional) but the dial failure would not be reported to the behaviour, causing e.g. libp2p-kad queries to potentially stall. In hindsight, I figured it is better to preserve the previous behaviour to still try alternative addresses of the peer even on invalid peer ID errors on an earlier address. In particular because in the context of libp2p-kad it is not uncommon for peers to report localhost addresses while the local node actually has e.g. an ipfs node running on that address, obviously with a different peer ID, which is the scenario causing frequent invalid peer ID (mismatch) errors when running the ipfs-kad example. This commit thus restores the previous behaviour w.r.t. trying all remaining addresses on invalid peer ID errors as well as making sure `inject_dial_error` is always called when the last attempt failed. [1440]: https://github.com/libp2p/rust-libp2p/pull/1440. * Remove an fmt::Debug requirement. |
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Roman Borschel
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8337687b3a
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Multiple connections per peer (#1440)
* Allow multiple connections per peer in libp2p-core. Instead of trying to enforce a single connection per peer, which involves quite a bit of additional complexity e.g. to prioritise simultaneously opened connections and can have other undesirable consequences [1], we now make multiple connections per peer a feature. The gist of these changes is as follows: The concept of a "node" with an implicit 1-1 correspondence to a connection has been replaced with the "first-class" concept of a "connection". The code from `src/nodes` has moved (with varying degrees of modification) to `src/connection`. A `HandledNode` has become a `Connection`, a `NodeHandler` a `ConnectionHandler`, the `CollectionStream` was the basis for the new `connection::Pool`, and so forth. Conceptually, a `Network` contains a `connection::Pool` which in turn internally employs the `connection::Manager` for handling the background `connection::manager::Task`s, one per connection, as before. These are all considered implementation details. On the public API, `Peer`s are managed as before through the `Network`, except now the API has changed with the shift of focus to (potentially multiple) connections per peer. The `NetworkEvent`s have accordingly also undergone changes. The Swarm APIs remain largely unchanged, except for the fact that `inject_replaced` is no longer called. It may now practically happen that multiple `ProtocolsHandler`s are associated with a single `NetworkBehaviour`, one per connection. If implementations of `NetworkBehaviour` rely somehow on communicating with exactly one `ProtocolsHandler`, this may cause issues, but it is unlikely. [1]: https://github.com/paritytech/substrate/issues/4272 * Fix intra-rustdoc links. * Update core/src/connection/pool.rs Co-Authored-By: Max Inden <mail@max-inden.de> * Address some review feedback and fix doc links. * Allow responses to be sent on the same connection. * Remove unnecessary remainders of inject_replaced. * Update swarm/src/behaviour.rs Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com> * Update swarm/src/lib.rs Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com> * Update core/src/connection/manager.rs Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com> * Update core/src/connection/manager.rs Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com> * Update core/src/connection/pool.rs Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com> * Incorporate more review feedback. * Move module declaration below imports. * Update core/src/connection/manager.rs Co-Authored-By: Toralf Wittner <tw@dtex.org> * Update core/src/connection/manager.rs Co-Authored-By: Toralf Wittner <tw@dtex.org> * Simplify as per review. * Fix rustoc link. * Add try_notify_handler and simplify. * Relocate DialingConnection and DialingAttempt. For better visibility constraints. * Small cleanup. * Small cleanup. More robust EstablishedConnectionIter. * Clarify semantics of `DialingPeer::connect`. * Don't call inject_disconnected on InvalidPeerId. To preserve the previous behavior and ensure calls to `inject_disconnected` are always paired with calls to `inject_connected`. * Provide public ConnectionId constructor. Mainly needed for testing purposes, e.g. in substrate. * Move the established connection limit check to the right place. * Clean up connection error handling. Separate connection errors into those occuring during connection setup or upon rejecting a newly established connection (the `PendingConnectionError`) and those errors occurring on previously established connections, i.e. for which a `ConnectionEstablished` event has been emitted by the connection pool earlier. * Revert change in log level and clarify an invariant. * Remove inject_replaced entirely. * Allow notifying all connection handlers. Thereby simplify by introducing a new enum `NotifyHandler`, used with a single constructor `NetworkBehaviourAction::NotifyHandler`. * Finishing touches. Small API simplifications and code deduplication. Some more useful debug logging. Co-authored-by: Max Inden <mail@max-inden.de> Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com> Co-authored-by: Toralf Wittner <tw@dtex.org> |