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use crate::behaviour::{FromSwarm, NetworkBehaviour, ToSwarm};
use crate::connection::ConnectionId;
use crate::handler::{
ConnectionEvent, DialUpgradeError, FullyNegotiatedInbound, FullyNegotiatedOutbound,
};
use crate::{
ConnectionDenied, ConnectionHandlerEvent, StreamUpgradeError, SubstreamProtocol, THandler,
THandlerInEvent, THandlerOutEvent,
};
use libp2p_core::transport::PortUse;
use libp2p_core::upgrade::DeniedUpgrade;
use libp2p_core::Endpoint;
use libp2p_core::Multiaddr;
use libp2p_identity::PeerId;
use std::task::{Context, Poll};
use void::Void;
/// Implementation of [`NetworkBehaviour`] that doesn't do anything.
pub struct Behaviour;
impl NetworkBehaviour for Behaviour {
type ConnectionHandler = ConnectionHandler;
type ToSwarm = Void;
fn handle_established_inbound_connection(
&mut self,
_: ConnectionId,
_: PeerId,
_: &Multiaddr,
_: &Multiaddr,
) -> Result<THandler<Self>, ConnectionDenied> {
Ok(ConnectionHandler)
}
fn handle_established_outbound_connection(
&mut self,
_: ConnectionId,
_: PeerId,
_: &Multiaddr,
_: Endpoint,
_: PortUse,
) -> Result<THandler<Self>, ConnectionDenied> {
Ok(ConnectionHandler)
}
fn on_connection_handler_event(
&mut self,
_: PeerId,
_: ConnectionId,
event: THandlerOutEvent<Self>,
) {
void::unreachable(event)
}
fn poll(&mut self, _: &mut Context<'_>) -> Poll<ToSwarm<Self::ToSwarm, THandlerInEvent<Self>>> {
Poll::Pending
}
fn on_swarm_event(&mut self, _event: FromSwarm) {}
}
/// An implementation of [`ConnectionHandler`] that neither handles any protocols nor does it keep the connection alive.
#[derive(Clone)]
pub struct ConnectionHandler;
impl crate::handler::ConnectionHandler for ConnectionHandler {
type FromBehaviour = Void;
type ToBehaviour = Void;
type InboundProtocol = DeniedUpgrade;
type OutboundProtocol = DeniedUpgrade;
type InboundOpenInfo = ();
type OutboundOpenInfo = Void;
fn listen_protocol(&self) -> SubstreamProtocol<Self::InboundProtocol, Self::InboundOpenInfo> {
SubstreamProtocol::new(DeniedUpgrade, ())
}
fn on_behaviour_event(&mut self, event: Self::FromBehaviour) {
void::unreachable(event)
}
fn poll(
&mut self,
_: &mut Context<'_>,
) -> Poll<
ConnectionHandlerEvent<Self::OutboundProtocol, Self::OutboundOpenInfo, Self::ToBehaviour>,
> {
Poll::Pending
}
fn on_connection_event(
&mut self,
event: ConnectionEvent<
Self::InboundProtocol,
Self::OutboundProtocol,
Self::InboundOpenInfo,
Self::OutboundOpenInfo,
>,
) {
match event {
ConnectionEvent::FullyNegotiatedInbound(FullyNegotiatedInbound {
protocol, ..
}) => void::unreachable(protocol),
ConnectionEvent::FullyNegotiatedOutbound(FullyNegotiatedOutbound {
protocol, ..
}) => void::unreachable(protocol),
ConnectionEvent::DialUpgradeError(DialUpgradeError { info: _, error }) => match error {
StreamUpgradeError::Timeout => unreachable!(),
StreamUpgradeError::Apply(e) => void::unreachable(e),
StreamUpgradeError::NegotiationFailed | StreamUpgradeError::Io(_) => {
unreachable!("Denied upgrade does not support any protocols")
}
},
ConnectionEvent::AddressChange(_)
| ConnectionEvent::ListenUpgradeError(_)
| ConnectionEvent::LocalProtocolsChange(_)
| ConnectionEvent::RemoteProtocolsChange(_) => {}
}
}
}
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