5b32c8a0d2
`Transport::listen_on` is an asynchronous operation. It returns immediately but the actual process of establishing a listening socket happens as part of `Transport::poll` which will return one or more `TransportEvent`s related to a particular `listen_on` call. Currently, `listen_on` returns a `ListenerId` which allows the user of the `Transport` interface to correlate the events with a particular `listen_on` call. This "user" is the `Swarm` runtime. Currently, a user of libp2p establishes a new listening socket by talking to the `Swarm::listen_on` interface and it is not possible to do the same thing via the `NetworkBehaviour` trait. Within the `NetworkBehaviour` trait, we emit _commands_ to the `Swarm` like `ToSwarm::Dial`. These commands don't have a "return value" like a synchronous function does and thus, if we were to add a `ToSwarm::ListenOn` command, it could not receive the `ListenerId` from the `Transport`. To fix this and to be consistent with our [coding guidelines](https://github.com/libp2p/rust-libp2p/blob/master/docs/coding-guidelines.md#allow-correlating-asynchronous-responses-to-their-requests) we change the interface of `Transport::listen_on` to require the user to pass in a `ListenerId`. This will allow us to construct a command in a `NetworkBehaviour` that remembers this ID which enables precise tracking of which events containing a `ListenerId` correlate which a particular `listen_on` command. This is especially important in the context of listening on wildcard addresses like `0.0.0.0` because we end up binding to multiple network interfaces and thus emit multiple events for a single `listen_on` call. Pull-Request: #3567.
Central repository for work on libp2p
This repository is the central place for Rust development of the libp2p spec.
Getting started
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Main documentation can be found on https://docs.rs/libp2p.
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The examples folder contains small binaries showcasing the many protocols in this repository.
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For security related issues please file a private security vulnerability report or reach out to security@libp2p.io. Please do not file a public issue on GitHub.
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To report bugs, suggest improvements or request new features please open a GitHub issue on this repository.
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For rust-libp2p specific questions please use the GitHub Discussions forum https://github.com/libp2p/rust-libp2p/discussions.
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For discussions and questions related to multiple libp2p implementations please use the libp2p Discourse forum https://discuss.libp2p.io.
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For general project updates and discussions join the biweekly libp2p Community Calls.
Repository Structure
The main components of this repository are structured as follows:
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core/: The implementation oflibp2p-corewith itsTransportandStreamMuxerAPI on which almost all other crates depend. -
transports/: Implementations of transport protocols (e.g. TCP) and protocol upgrades (e.g. for authenticated encryption, compression, ...) based on thelibp2p-coreTransportAPI . -
muxers/: Implementations of theStreamMuxerinterface oflibp2p-core, e.g. (sub)stream multiplexing protocols on top of (typically TCP) connections. Multiplexing protocols are (mandatory)Transportupgrades. -
swarm/: The implementation oflibp2p-swarmbuilding onlibp2p-corewith the central interfacesNetworkBehaviourandConnectionHandlerused to implement application protocols (seeprotocols/). -
protocols/: Implementations of application protocols based on thelibp2p-swarmAPIs. -
misc/: Utility libraries. -
libp2p/examples/: Worked examples of built-in application protocols (seeprotocols/) with commonTransportconfigurations.
Community Guidelines
The libp2p project operates under the IPFS Code of Conduct.
tl;dr
- Be respectful.
- We're here to help: abuse@ipfs.io
- Abusive behavior is never tolerated.
- Violations of this code may result in swift and permanent expulsion from the IPFS [and libp2p] community.
- "Too long, didn't read" is not a valid excuse for not knowing what is in this document.
Maintainers
(In alphabetical order.)
- João Oliveira (@jxs)
- Max Inden (@mxinden)
- Thomas Eizinger (@thomaseizinger)
Notable users
(open a pull request if you want your project to be added here)
- COMIT - Bitcoin–Monero Cross-chain Atomic Swap.
- Forest - An implementation of Filecoin written in Rust.
- fuel-core - A Rust implementation of the Fuel protocol.
- HotShot - Decentralized sequencer in Rust developed by Espresso Systems.
- ipfs-embed - A small embeddable ipfs implementation used and maintained by Actyx.
- iroh - Next-generation implementation of IPFS for Cloud & Mobile platforms.
- Lighthouse - Ethereum consensus client in Rust.
- Locutus - Global, observable, decentralized key-value store.
- rust-ipfs - IPFS implementation in Rust.
- Starcoin - A smart contract blockchain network that scales by layering.
- Subspace - Subspace Network reference implementation
- Substrate - Framework for blockchain innovation, used by Polkadot.
- Ursa - Decentralized Content Delivery & Edge Compute.