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105 lines
3.3 KiB
105 lines
3.3 KiB
use crate::{
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network::request_response::{AliceToBob, BobToAlice, Codec, Message2Protocol, TIMEOUT},
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protocol::bob,
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};
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use libp2p::{
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request_response::{
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handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
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RequestResponseEvent, RequestResponseMessage,
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},
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swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
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NetworkBehaviour, PeerId,
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};
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use std::{
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collections::VecDeque,
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task::{Context, Poll},
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time::Duration,
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};
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use tracing::{debug, error};
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#[derive(Debug)]
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pub enum OutEvent {
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Msg {
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msg: bob::Message2,
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bob_peer_id: PeerId,
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},
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}
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/// A `NetworkBehaviour` that represents receiving of message 2 from Bob.
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#[derive(NetworkBehaviour)]
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#[behaviour(out_event = "OutEvent", poll_method = "poll")]
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#[allow(missing_debug_implementations)]
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pub struct Behaviour {
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rr: RequestResponse<Codec<Message2Protocol>>,
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#[behaviour(ignore)]
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events: VecDeque<OutEvent>,
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}
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impl Behaviour {
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fn poll(
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&mut self,
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_: &mut Context<'_>,
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_: &mut impl PollParameters,
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) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message2Protocol>>, OutEvent>> {
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if let Some(event) = self.events.pop_front() {
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return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
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}
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Poll::Pending
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}
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}
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impl Default for Behaviour {
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fn default() -> Self {
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let timeout = Duration::from_secs(TIMEOUT);
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let mut config = RequestResponseConfig::default();
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config.set_request_timeout(timeout);
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Self {
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rr: RequestResponse::new(
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Codec::default(),
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vec![(Message2Protocol, ProtocolSupport::Full)],
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config,
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),
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events: Default::default(),
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}
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}
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}
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impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>> for Behaviour {
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fn inject_event(&mut self, event: RequestResponseEvent<BobToAlice, AliceToBob>) {
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match event {
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RequestResponseEvent::Message {
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peer,
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message:
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RequestResponseMessage::Request {
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request, channel, ..
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},
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} => {
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if let BobToAlice::Message2(msg) = request {
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debug!("Received Message 2");
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self.events.push_back(OutEvent::Msg {
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msg: *msg,
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bob_peer_id: peer,
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});
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// Send back empty response so that the request/response protocol completes.
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let _ = self.rr.send_response(channel, AliceToBob::Message2);
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}
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}
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RequestResponseEvent::Message {
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message: RequestResponseMessage::Response { .. },
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..
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} => panic!("Alice should not get a Response"),
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RequestResponseEvent::InboundFailure { error, .. } => {
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error!("Inbound failure: {:?}", error);
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}
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RequestResponseEvent::OutboundFailure { error, .. } => {
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error!("Outbound failure: {:?}", error);
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}
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RequestResponseEvent::ResponseSent { .. } => {
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debug!("Alice has sent a Message2 response to Bob");
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}
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}
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}
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}
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