How to send/recv data after dcutr ConnectionEstablished

[simon-fu]

I run the dcutr example with relay-server , and both of client nodes receive ConnectionEstablished event successfully. Next step I want to send something like "hello world" from one client to the other. But I don't know how to do that. I can't find any function in dcutr::Behaviour for sending/receiving data.

Could anyone told me how to do that?

Further more, Can anyone provide some guidance or examples on how to use yamux to create multiple streams after establishing a connection with DCUTR?

Thank you in advance!

[thomaseizinger]

Further more, Can anyone provide some guidance or examples on how to use yamux to create multiple streams after establishing a connection with DCUTR?

Yamux is handled implicitly for you, you don't need to deal with it.

Could anyone told me how to do that?

You need to create a separate protocol for that! See https://github.com/libp2p/rust-libp2p/tree/master/examples/file-sharing for some point-to-point communication using libp2p-request-response.

[mxinden]

There is last question that request_response mod implements request/response protocol , and which mod implements stream protocol just like TcpStream ？

None today. There have been plans #1947 but they never merged into master.

[simon-fu]

It is sad to hear that. Stream transport is widely used and it would be very helpful if rust-libp2p supported that。

[thomaseizinger]

We support streams (they are the primitive that everything builds on top of), you just need to implement your protocol in terms of ConnectionHandler and NetworkBehaviour.

[simon-fu]

Got it. I will try to implement it later directly based on ConnectionHandler and NetworkBehaviour. It is a little difficult for me to do that since I am newbie to rust-libp2p. It would be very helpful if rust-libp2p supported that natively.

[thomaseizinger]

It is a little difficult for me to do that since I am newbie to rust-libp2p.

There is a bit of a learning curve to it which we are actively working on reducing. But I think that same as Rust itself, it is worth it :)

It would be very helpful if rust-libp2p supported that natively.

We always welcome contributions of new modules!