mirror of
https://github.com/fluencelabs/rust-libp2p
synced 2025-04-25 19:02:13 +00:00
100 lines
3.7 KiB
Rust
100 lines
3.7 KiB
Rust
// Copyright 2018 Parity Technologies (UK) Ltd.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//! A basic example demonstrating some core APIs and concepts of libp2p.
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//!
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//! In the first terminal window, run:
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//!
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//! ```sh
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//! cargo run --example ping
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//! ```
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//!
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//! It will print the PeerId and the listening address, e.g. `Listening on
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//! "/ip4/0.0.0.0/tcp/24915"`
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//!
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//! In the second terminal window, start a new instance of the example with:
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//!
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//! ```sh
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//! cargo run --example ping -- /ip4/127.0.0.1/tcp/24915
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//! ```
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//!
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//! The two nodes establish a connection, negotiate the ping protocol
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//! and begin pinging each other.
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use futures::{prelude::*, future};
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use libp2p::{ identity, PeerId, ping::Ping, Swarm };
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use std::env;
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fn main() {
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env_logger::init();
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// Create a random PeerId.
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let id_keys = identity::Keypair::generate_ed25519();
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let peer_id = PeerId::from(id_keys.public());
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println!("Local peer id: {:?}", peer_id);
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// Create a transport.
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let transport = libp2p::build_development_transport(id_keys);
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// Create a ping network behaviour.
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let behaviour = Ping::default();
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// Create a Swarm that establishes connections through the given transport
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// and applies the ping behaviour on each connection.
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let mut swarm = Swarm::new(transport, behaviour, peer_id);
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// Dial the peer identified by the multi-address given as the second
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// command-line argument, if any.
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if let Some(addr) = env::args().nth(1) {
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let remote_addr = addr.clone();
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match addr.parse() {
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Ok(remote) => {
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match Swarm::dial_addr(&mut swarm, remote) {
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Ok(()) => println!("Dialed {:?}", remote_addr),
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Err(e) => println!("Dialing {:?} failed with: {:?}", remote_addr, e)
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}
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},
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Err(err) => println!("Failed to parse address to dial: {:?}", err),
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}
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}
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// Tell the swarm to listen on all interfaces and a random, OS-assigned port.
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Swarm::listen_on(&mut swarm, "/ip4/0.0.0.0/tcp/0".parse().unwrap()).unwrap();
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// Use tokio to drive the `Swarm`.
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let mut listening = false;
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tokio::run(future::poll_fn(move || -> Result<_, ()> {
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loop {
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match swarm.poll().expect("Error while polling swarm") {
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Async::Ready(Some(e)) => println!("{:?}", e),
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Async::Ready(None) | Async::NotReady => {
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if !listening {
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if let Some(a) = Swarm::listeners(&swarm).next() {
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println!("Listening on {:?}", a);
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listening = true;
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}
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}
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return Ok(Async::NotReady)
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}
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}
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}
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}));
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}
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