mirror of
https://github.com/fluencelabs/rust-libp2p
synced 2025-05-04 23:22:16 +00:00
220f84a97f
Enable advanced dialing requests both on `Swarm` and via
`NetworkBehaviourAction`. Users can now trigger a dial with a specific
set of addresses, optionally extended via
`NetworkBehaviour::addresses_of_peer`. In addition the whole process is
now modelled in a type safe way via the builder pattern.
Example of a `NetworkBehaviour` requesting a dial to a specific peer
with a set of addresses additionally extended through
`NetworkBehaviour::addresses_of_peer`:
```rust
NetworkBehaviourAction::Dial {
opts: DialOpts::peer_id(peer_id)
.condition(PeerCondition::Always)
.addresses(addresses)
.extend_addresses_through_behaviour()
.build(),
handler,
}
```
Example of a user requesting a dial to an unknown peer with a single
address via `Swarm`:
```rust
swarm1.dial(
DialOpts::unknown_peer_id()
.address(addr2.clone())
.build()
)
```
92 lines
3.4 KiB
Rust
92 lines
3.4 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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//! Ping example
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//!
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//! See ../src/tutorial.rs for a step-by-step guide building the example below.
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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 addresses, 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::executor::block_on;
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use futures::prelude::*;
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use libp2p::swarm::{Swarm, SwarmEvent};
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use libp2p::{identity, ping, Multiaddr, PeerId};
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use std::error::Error;
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use std::task::Poll;
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fn main() -> Result<(), Box<dyn Error>> {
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let local_key = identity::Keypair::generate_ed25519();
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let local_peer_id = PeerId::from(local_key.public());
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println!("Local peer id: {:?}", local_peer_id);
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let transport = block_on(libp2p::development_transport(local_key))?;
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// Create a ping network behaviour.
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//
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// For illustrative purposes, the ping protocol is configured to
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// keep the connection alive, so a continuous sequence of pings
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// can be observed.
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let behaviour = ping::Behaviour::new(ping::Config::new().with_keep_alive(true));
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let mut swarm = Swarm::new(transport, behaviour, local_peer_id);
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// Tell the swarm to listen on all interfaces and a random, OS-assigned
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// port.
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swarm.listen_on("/ip4/0.0.0.0/tcp/0".parse()?)?;
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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) = std::env::args().nth(1) {
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let remote: Multiaddr = addr.parse()?;
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swarm.dial(remote)?;
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println!("Dialed {}", addr)
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}
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block_on(future::poll_fn(move |cx| loop {
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match swarm.poll_next_unpin(cx) {
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Poll::Ready(Some(event)) => match event {
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SwarmEvent::NewListenAddr { address, .. } => println!("Listening on {:?}", address),
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SwarmEvent::Behaviour(event) => println!("{:?}", event),
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_ => {}
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},
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Poll::Ready(None) => return Poll::Ready(()),
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Poll::Pending => return Poll::Pending,
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}
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}));
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Ok(())
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}
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