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chore: Implement multiplexer stage (#4)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,2 @@ | ||
| pub mod chainsync; | ||
| pub mod plexer; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| use gasket::error::AsWorkError; | ||
| use pallas::network::miniprotocols::handshake; | ||
| use pallas::network::multiplexer; | ||
| use pallas::network::multiplexer::bearers::Bearer; | ||
| use pallas::network::multiplexer::demux::{Demuxer, Egress}; | ||
| use pallas::network::multiplexer::mux::{Ingress, Muxer}; | ||
| use pallas::network::multiplexer::sync::SyncPlexer; | ||
|
|
||
| type InputPort = gasket::messaging::InputPort<(u16, multiplexer::Payload)>; | ||
| type OutputPort = gasket::messaging::OutputPort<multiplexer::Payload>; | ||
|
|
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| struct GasketEgress(OutputPort); | ||
|
|
||
| impl Egress for GasketEgress { | ||
| fn send( | ||
| &mut self, | ||
| payload: multiplexer::Payload, | ||
| ) -> Result<(), multiplexer::demux::EgressError> { | ||
| self.0 | ||
| .send(gasket::messaging::Message::from(payload)) | ||
| .map_err(|_| multiplexer::demux::EgressError(vec![])) | ||
| } | ||
| } | ||
|
|
||
| struct GasketIngress(InputPort); | ||
|
|
||
| impl Ingress for GasketIngress { | ||
| fn recv_timeout( | ||
| &mut self, | ||
| duration: std::time::Duration, | ||
| ) -> Result<multiplexer::Message, multiplexer::mux::IngressError> { | ||
| self.0 | ||
| .recv_timeout(duration) | ||
| .map(|msg| msg.payload) | ||
| .map_err(|err| match err { | ||
| gasket::error::Error::RecvIdle => multiplexer::mux::IngressError::Empty, | ||
| _ => multiplexer::mux::IngressError::Disconnected, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| struct Session { | ||
| demuxer: Demuxer<GasketEgress>, | ||
| muxer: Muxer<GasketIngress>, | ||
| } | ||
|
|
||
| type IsBusy = bool; | ||
|
|
||
| impl Session { | ||
| fn demux_tick(&mut self) -> Result<IsBusy, gasket::error::Error> { | ||
| match self.demuxer.tick() { | ||
| Ok(x) => match x { | ||
| multiplexer::demux::TickOutcome::Busy => Ok(true), | ||
| multiplexer::demux::TickOutcome::Idle => Ok(false), | ||
| }, | ||
| Err(err) => match err { | ||
| multiplexer::demux::DemuxError::BearerError(err) => { | ||
| Err(gasket::error::Error::ShouldRestart(err.to_string())) | ||
| } | ||
| multiplexer::demux::DemuxError::EgressDisconnected(x, _) => Err( | ||
| gasket::error::Error::WorkPanic(format!("egress disconnected {}", x)), | ||
| ), | ||
| multiplexer::demux::DemuxError::EgressUnknown(x, _) => Err( | ||
| gasket::error::Error::WorkPanic(format!("unknown egress {}", x)), | ||
| ), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| fn mux_tick(&mut self) -> Result<IsBusy, gasket::error::Error> { | ||
| match self.muxer.tick() { | ||
| multiplexer::mux::TickOutcome::Busy => Ok(true), | ||
| multiplexer::mux::TickOutcome::Idle => Ok(false), | ||
| multiplexer::mux::TickOutcome::BearerError(err) => { | ||
| Err(gasket::error::Error::ShouldRestart(err.to_string())) | ||
| } | ||
| multiplexer::mux::TickOutcome::IngressDisconnected => Err( | ||
| gasket::error::Error::WorkPanic("ingress disconnected".into()), | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub struct Worker { | ||
| peer_address: String, | ||
| network_magic: u64, | ||
| input: InputPort, | ||
| channel5_out: OutputPort, | ||
| session: Option<Session>, | ||
| } | ||
|
|
||
| impl Worker { | ||
| pub fn new( | ||
| peer_address: String, | ||
| network_magic: u64, | ||
| input: InputPort, | ||
| channel5_out: OutputPort, | ||
| ) -> Self { | ||
| Self { | ||
| peer_address, | ||
| network_magic, | ||
| input, | ||
| channel5_out, | ||
| session: None, | ||
| } | ||
| } | ||
|
|
||
| fn handshake(&self, bearer: Bearer) -> Result<Bearer, gasket::error::Error> { | ||
| log::debug!("doing handshake"); | ||
|
|
||
| let plexer = SyncPlexer::new(bearer, 0); | ||
| let versions = handshake::n2n::VersionTable::v7_and_above(self.network_magic); | ||
| let mut client = handshake::Client::new(plexer); | ||
|
|
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| let output = client.handshake(versions).or_panic()?; | ||
| log::info!("handshake output: {:?}", output); | ||
|
|
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| let bearer = client.unwrap().unwrap(); | ||
|
|
||
| match output { | ||
| handshake::Confirmation::Accepted(version, _) => { | ||
| log::info!("connected to upstream peer using version {}", version); | ||
| Ok(bearer) | ||
| } | ||
| _ => Err(gasket::error::Error::WorkPanic( | ||
| "couldn't agree on handshake version".into(), | ||
| )), | ||
| } | ||
| } | ||
|
|
||
| fn connect(&self) -> Result<Session, gasket::error::Error> { | ||
| log::debug!("connecting muxer"); | ||
|
|
||
| let bearer = multiplexer::bearers::Bearer::connect_tcp(&self.peer_address).or_restart()?; | ||
|
|
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| let bearer = self.handshake(bearer)?; | ||
|
|
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| let mut demuxer = Demuxer::new(bearer.clone()); | ||
| demuxer.register(5, GasketEgress(self.channel5_out.clone())); | ||
|
|
||
| let muxer = Muxer::new(bearer, GasketIngress(self.input.clone())); | ||
|
|
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| Ok(Session { demuxer, muxer }) | ||
| } | ||
| } | ||
|
|
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| impl gasket::runtime::Worker for Worker { | ||
| fn metrics(&self) -> gasket::metrics::Registry { | ||
| // TODO: define networking metrics (bytes in / out, etc) | ||
| gasket::metrics::Builder::new().build() | ||
| } | ||
|
|
||
| fn bootstrap(&mut self) -> Result<(), gasket::error::Error> { | ||
| let session = self.connect()?; | ||
| self.session = Some(session); | ||
|
|
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| Ok(()) | ||
| } | ||
|
|
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| fn work(&mut self) -> gasket::runtime::WorkResult { | ||
| let session = self.session.as_mut().unwrap(); | ||
|
|
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| session.demux_tick()?; | ||
| session.mux_tick()?; | ||
|
|
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| Ok(gasket::runtime::WorkOutcome::Partial) | ||
| } | ||
| } |