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ping-onion.rs
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ping-onion.rs
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// Copyright 2018 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//! Ping example
//!
//! See ../src/tutorial.rs for a step-by-step guide building the example below.
//!
//! In the first terminal window, run:
//!
//! ```sh
//! cargo run --example ping
//! ```
//!
//! It will print the PeerId and the listening addresses, e.g. `Listening on
//! "/ip4/0.0.0.0/tcp/24915"`
//!
//! In the second terminal window, start a new instance of the example with:
//!
//! ```sh
//! cargo run --example ping -- /ip4/127.0.0.1/tcp/24915
//! ```
//!
//! The two nodes establish a connection, negotiate the ping protocol
//! and begin pinging each other.
use futures::prelude::*;
use libp2p::swarm::{Swarm, SwarmEvent};
use libp2p::{
core::upgrade, dns, identity, mplex, noise, onion, ping, tcp, yamux, Multiaddr, PeerId,
Transport,
};
use std::error::Error;
async fn onion_transport(
keypair: identity::Keypair,
) -> Result<
libp2p_core::transport::Boxed<(PeerId, libp2p_core::muxing::StreamMuxerBox)>,
Box<dyn Error>,
> {
use std::time::Duration;
let transport = {
let dns_tcp = dns::DnsConfig::system(tcp::TcpTransport::new(
tcp::GenTcpConfig::new().nodelay(true),
))
.await?;
let onion = onion::OnionClient::from_builder(onion::OnionClient::builder())?;
println!("bootstrapping...");
onion.bootstrap().await?;
println!("bootstrapped!");
onion.or_transport(dns_tcp)
};
let noise_keys = noise::Keypair::<noise::X25519Spec>::new()
.into_authentic(&keypair)
.expect("Signing libp2p-noise static DH keypair failed.");
Ok(transport
.upgrade(upgrade::Version::V1)
.authenticate(noise::NoiseConfig::xx(noise_keys).into_authenticated())
.multiplex(upgrade::SelectUpgrade::new(
yamux::YamuxConfig::default(),
mplex::MplexConfig::default(),
))
.timeout(Duration::from_secs(20))
.boxed())
}
#[async_std::main]
async fn main() -> Result<(), Box<dyn Error>> {
let local_key = identity::Keypair::generate_ed25519();
let local_peer_id = PeerId::from(local_key.public());
println!("Local peer id: {:?}", local_peer_id);
let transport = onion_transport(local_key).await?;
// Create a ping network behaviour.
//
// For illustrative purposes, the ping protocol is configured to
// keep the connection alive, so a continuous sequence of pings
// can be observed.
let behaviour = ping::Behaviour::new(ping::Config::new().with_keep_alive(true));
let mut swarm = Swarm::new(transport, behaviour, local_peer_id);
// Tell the swarm to listen on all interfaces and a random, OS-assigned
// port.
swarm.listen_on("/ip4/0.0.0.0/tcp/0".parse()?)?;
// Dial the peer identified by the multi-address given as the second
// command-line argument, if any.
if let Some(addr) = std::env::args().nth(1) {
let remote: Multiaddr = addr.parse()?;
swarm.dial(remote)?;
println!("Dialed {}", addr)
}
loop {
match swarm.select_next_some().await {
SwarmEvent::NewListenAddr { address, .. } => println!("Listening on {:?}", address),
SwarmEvent::Behaviour(event) => println!("{:?}", event),
_ => {}
}
}
}