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// Copyright 2023 Protocol Labs.
//
// 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.
//! [`NetworkBehaviour`] of the libp2p perf client protocol.
use std::{
collections::{HashSet, VecDeque},
task::{Context, Poll},
};
use libp2p_core::{transport::PortUse, Multiaddr};
use libp2p_identity::PeerId;
use libp2p_swarm::{
derive_prelude::ConnectionEstablished, ConnectionClosed, ConnectionId, FromSwarm,
NetworkBehaviour, NotifyHandler, THandlerInEvent, THandlerOutEvent, ToSwarm,
};
use crate::RunParams;
use crate::{client::handler::Handler, RunUpdate};
use super::{RunError, RunId};
#[derive(Debug)]
pub struct Event {
pub id: RunId,
pub result: Result<RunUpdate, RunError>,
}
#[derive(Default)]
pub struct Behaviour {
/// Queue of actions to return when polled.
queued_events: VecDeque<ToSwarm<Event, THandlerInEvent<Self>>>,
/// Set of connected peers.
connected: HashSet<PeerId>,
}
impl Behaviour {
pub fn new() -> Self {
Self::default()
}
pub fn perf(&mut self, server: PeerId, params: RunParams) -> Result<RunId, NotConnected> {
if !self.connected.contains(&server) {
return Err(NotConnected {});
}
let id = RunId::next();
self.queued_events.push_back(ToSwarm::NotifyHandler {
peer_id: server,
handler: NotifyHandler::Any,
event: crate::client::handler::Command { id, params },
});
Ok(id)
}
}
#[derive(thiserror::Error, Debug)]
pub struct NotConnected();
impl std::fmt::Display for NotConnected {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "not connected to peer")
}
}
impl NetworkBehaviour for Behaviour {
type ConnectionHandler = Handler;
type ToSwarm = Event;
fn handle_established_outbound_connection(
&mut self,
_connection_id: ConnectionId,
_peer: PeerId,
_addr: &Multiaddr,
_role_override: libp2p_core::Endpoint,
_port_use: PortUse,
) -> Result<libp2p_swarm::THandler<Self>, libp2p_swarm::ConnectionDenied> {
Ok(Handler::default())
}
fn handle_established_inbound_connection(
&mut self,
_connection_id: ConnectionId,
_peer: PeerId,
_local_addr: &Multiaddr,
_remote_addr: &Multiaddr,
) -> Result<libp2p_swarm::THandler<Self>, libp2p_swarm::ConnectionDenied> {
Ok(Handler::default())
}
fn on_swarm_event(&mut self, event: FromSwarm) {
match event {
FromSwarm::ConnectionEstablished(ConnectionEstablished { peer_id, .. }) => {
self.connected.insert(peer_id);
}
FromSwarm::ConnectionClosed(ConnectionClosed {
peer_id,
connection_id: _,
endpoint: _,
remaining_established,
..
}) => {
if remaining_established == 0 {
assert!(self.connected.remove(&peer_id));
}
}
_ => {}
}
}
fn on_connection_handler_event(
&mut self,
_event_source: PeerId,
_connection_id: ConnectionId,
super::handler::Event { id, result }: THandlerOutEvent<Self>,
) {
self.queued_events
.push_back(ToSwarm::GenerateEvent(Event { id, result }));
}
#[tracing::instrument(level = "trace", name = "NetworkBehaviour::poll", skip(self))]
fn poll(&mut self, _: &mut Context<'_>) -> Poll<ToSwarm<Self::ToSwarm, THandlerInEvent<Self>>> {
if let Some(event) = self.queued_events.pop_front() {
return Poll::Ready(event);
}
Poll::Pending
}
}
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