cf3e4c6860
Implement `Transport::dial_as_listener` for QUIC as specified by the [DCUtR spec](https://github.com/libp2p/specs/blob/master/relay/DCUtR.md). To facilitate hole punching in QUIC, one side needs to send random UDP packets to establish a mapping in the routing table of the NAT device. If successful, our listener will emit a new inbound connection. This connection needs to then be sent to the dialing task. We achieve this by storing a `HashMap` of hole punch attempts indexed by the remote's `SocketAddr`. A matching incoming connection is then sent via a oneshot channel to the dialing task which continues with upgrading the connection. Related #2883. Pull-Request: #3964.
Description
The libp2p relay example showcases how to create a relay node that can route messages between different peers in a p2p network.
Usage
To run the example, follow these steps:
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Run the relay node by executing the following command:
cargo run -- --port <port> --secret-key-seed <seed>Replace
<port>with the port number on which the relay node will listen for incoming connections. Replace<seed>with a seed value used to generate a deterministic peer ID for the relay node. -
The relay node will start listening for incoming connections. It will print the listening address once it is ready.
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Connect other libp2p nodes to the relay node by specifying the relay's listening address as one of the bootstrap nodes in their configuration.
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Once the connections are established, the relay node will facilitate communication between the connected peers, allowing them to exchange messages and data.
Conclusion
The libp2p relay example demonstrates how to implement a relay node. By running a relay node and connecting other libp2p nodes to it, users can create a decentralized network where peers can communicate and interact with each other.