Struct darkfi::net::channel::Channel

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pub struct Channel {
    reader: Mutex<ReadHalf<Box<dyn PtStream>>>,
    writer: Mutex<WriteHalf<Box<dyn PtStream>>>,
    message_subsystem: MessageSubsystem,
    stop_publisher: PublisherPtr<Error>,
    receive_task: StoppableTaskPtr,
    stopped: AtomicBool,
    session: SessionWeakPtr,
    version: Mutex<Option<Arc<VersionMessage>>>,
    pub info: ChannelInfo,
}
Expand description

Async channel for communication between nodes.

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§reader: Mutex<ReadHalf<Box<dyn PtStream>>>

The reading half of the transport stream

§writer: Mutex<WriteHalf<Box<dyn PtStream>>>

The writing half of the transport stream

§message_subsystem: MessageSubsystem

The message subsystem instance for this channel

§stop_publisher: PublisherPtr<Error>

Publisher listening for stop signal for closing this channel

§receive_task: StoppableTaskPtr

Task that is listening for the stop signal

§stopped: AtomicBool

A boolean marking if this channel is stopped

§session: SessionWeakPtr

Weak pointer to respective session

§version: Mutex<Option<Arc<VersionMessage>>>

The version message of the node we are connected to. Some if the version exchange has already occurred, None otherwise.

§info: ChannelInfo

Channel debug info

Implementations§

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impl Channel

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pub async fn new( stream: Box<dyn PtStream>, resolve_addr: Option<Url>, connect_addr: Url, session: SessionWeakPtr ) -> Arc<Self>

Sets up a new channel. Creates a reader and writer PtStream and the message publisher subsystem. Performs a network handshake on the subsystem dispatchers.

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async fn setup_dispatchers(subsystem: &MessageSubsystem)

Perform network handshake for message subsystem dispatchers.

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pub fn start(self: Arc<Self>, executor: Arc<Executor<'_>>)

Starts the channel. Runs a receive loop to start receiving messages or handles a network failure.

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pub async fn stop(&self)

Stops the channel. Notifies all publishers that the channel has been closed in handle_stop().

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pub async fn subscribe_stop(&self) -> Result<Subscription<Error>>

Creates a subscription to a stopped signal. If the channel is stopped then this will return a ChannelStopped error.

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pub fn is_stopped(&self) -> bool

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pub async fn send<M: Message>(&self, message: &M) -> Result<()>

Sends a message across a channel. Calls send_message that creates a new payload and sends it over the network transport as a packet. Returns an error if something goes wrong.

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async fn send_message<M: Message>(&self, payload: &M) -> Result<()>

Sends an outbound Message by writing data to the given async stream.

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pub async fn read_command<R: AsyncRead + Unpin + Send + Sized>( &self, stream: &mut R ) -> Result<String>

Returns a decoded Message command. We start by extracting the length from the stream, then allocate the precise buffer for this length using stream.take(). This provides a basic DDOS protection.

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pub async fn subscribe_msg<M: Message>(&self) -> Result<MessageSubscription<M>>

Subscribe to a message on the message subsystem.

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async fn handle_stop(self: Arc<Self>, result: Result<()>)

Handle network errors. Panic if error passes silently, otherwise broadcast the error.

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async fn main_receive_loop(self: Arc<Self>) -> Result<()>

Run the receive loop. Start receiving messages or handle network failure.

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pub async fn ban(&self, peer: &Url)

Ban a malicious peer and stop the channel.

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pub fn address(&self) -> &Url

Returns the relevant socket address for this connection. If this is an outbound connection, the transport-processed resolve_addr will be returned. Otherwise for inbound connections it will default to connect_addr.

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pub fn resolve_addr(&self) -> Option<Url>

Returns the socket address that has undergone transport processing, if it exists. Returns None otherwise.

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pub fn connect_addr(&self) -> &Url

Return the socket address without transport processing.

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pub(crate) async fn set_version(&self, version: Arc<VersionMessage>)

Set the VersionMessage of the node this channel is connected to. Called on receiving a version message in ProtocolVersion.

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pub fn message_subsystem(&self) -> &MessageSubsystem

Returns the inner MessageSubsystem reference

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fn session(&self) -> Arc<dyn Session>

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pub fn session_type_id(&self) -> SessionBitFlag

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fn p2p(&self) -> P2pPtr

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fn is_eof_error(err: &Error) -> bool

Trait Implementations§

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impl Debug for Channel

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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