Struct libp2p_request_response::RequestResponse

pub struct RequestResponse<TCodec> where
    TCodec: RequestResponseCodec + Clone + Send + 'static,  { /* fields omitted */ }

A request/response protocol for some message codec.

Implementations

impl<TCodec> RequestResponse<TCodec> where
    TCodec: RequestResponseCodec + Clone + Send + 'static, 

pub fn new<I>(codec: TCodec, protocols: I, cfg: RequestResponseConfig) -> Self where
    I: IntoIterator<Item = (TCodec::Protocol, ProtocolSupport)>, 

Creates a new RequestResponse behaviour for the given protocols, codec and configuration.

pub fn send_request(
    &mut self,
    peer: &PeerId,
    request: TCodec::Request
) -> RequestId

Initiates sending a request.

If the targeted peer is currently not connected, a dialing attempt is initiated and the request is sent as soon as a connection is established.

Note: In order for such a dialing attempt to succeed, the RequestResonse protocol must either be embedded in another NetworkBehaviour that provides peer and address discovery, or known addresses of peers must be managed via RequestResponse::add_address and RequestResponse::remove_address.

pub fn send_response(
    &mut self,
    ch: ResponseChannel<TCodec::Response>,
    rs: TCodec::Response
) -> Result<(), TCodec::Response>

Initiates sending a response to an inbound request.

If the ResponseChannel is already closed due to a timeout or the connection being closed, the response is returned as an Err for further handling. Once the response has been successfully sent on the corresponding connection, RequestResponseEvent::ResponseSent is emitted. In all other cases RequestResponseEvent::InboundFailure will be or has been emitted.

The provided ResponseChannel is obtained from an inbound RequestResponseMessage::Request.

pub fn add_address(&mut self, peer: &PeerId, address: Multiaddr)

Adds a known address for a peer that can be used for dialing attempts by the Swarm, i.e. is returned by NetworkBehaviour::addresses_of_peer.

Addresses added in this way are only removed by remove_address.

pub fn remove_address(&mut self, peer: &PeerId, address: &Multiaddr)

Removes an address of a peer previously added via add_address.

pub fn is_connected(&self, peer: &PeerId) -> bool

Checks whether a peer is currently connected.

pub fn is_pending_outbound(&self, peer: &PeerId, request_id: &RequestId) -> bool

Checks whether an outbound request to the peer with the provided PeerId initiated by RequestResponse::send_request is still pending, i.e. waiting for a response.

pub fn is_pending_inbound(&self, peer: &PeerId, request_id: &RequestId) -> bool

Checks whether an inbound request from the peer with the provided PeerId is still pending, i.e. waiting for a response by the local node through RequestResponse::send_response.

Trait Implementations

impl<TCodec> NetworkBehaviour for RequestResponse<TCodec> where
    TCodec: RequestResponseCodec + Send + Clone + 'static, 

type ProtocolsHandler = RequestResponseHandler<TCodec>

Handler for all the protocols the network behaviour supports.

type OutEvent = RequestResponseEvent<TCodec::Request, TCodec::Response>

Event generated by the NetworkBehaviour and that the swarm will report back.

fn new_handler(&mut self) -> Self::ProtocolsHandler

Creates a new ProtocolsHandler for a connection with a peer.

fn addresses_of_peer(&mut self, peer: &PeerId) -> Vec<Multiaddr>

Addresses that this behaviour is aware of for this specific peer, and that may allow reaching the peer.

fn inject_connected(&mut self, peer: &PeerId)

Indicate to the behaviour that we connected to the node with the given peer id.

fn inject_connection_established(
    &mut self,
    peer: &PeerId,
    conn: &ConnectionId,
    endpoint: &ConnectedPoint,
    _errors: Option<&Vec<Multiaddr>>
)

Informs the behaviour about a newly established connection to a peer.

fn inject_connection_closed(
    &mut self,
    peer_id: &PeerId,
    conn: &ConnectionId,
    _: &ConnectedPoint,
    _: <Self::ProtocolsHandler as IntoProtocolsHandler>::Handler
)

Informs the behaviour about a closed connection to a peer.

fn inject_disconnected(&mut self, peer: &PeerId)

Indicates to the behaviour that we disconnected from the node with the given peer id.

fn inject_dial_failure(
    &mut self,
    peer: Option<PeerId>,
    _: Self::ProtocolsHandler,
    _: &DialError
)

Indicates to the behaviour that the dial to a known or unknown node failed.

fn inject_event(
    &mut self,
    peer: PeerId,
    connection: ConnectionId,
    event: RequestResponseHandlerEvent<TCodec>
)

Informs the behaviour about an event generated by the handler dedicated to the peer identified by peer_id. for the behaviour.

fn poll(
    &mut self,
    _: &mut Context<'_>,
    _: &mut impl PollParameters
) -> Poll<NetworkBehaviourAction<Self::OutEvent, Self::ProtocolsHandler>>

Polls for things that swarm should do.

fn inject_address_change(
    &mut self,
    &PeerId,
    &ConnectionId,
    _old: &ConnectedPoint,
    _new: &ConnectedPoint
)

Informs the behaviour that the ConnectedPoint of an existing connection has changed.

fn inject_listen_failure(
    &mut self,
    _local_addr: &Multiaddr,
    _send_back_addr: &Multiaddr,
    _handler: Self::ProtocolsHandler
)

Indicates to the behaviour that an error happened on an incoming connection during its initial handshake.

fn inject_new_listener(&mut self, _id: ListenerId)

Indicates to the behaviour that a new listener was created.

fn inject_new_listen_addr(&mut self, _id: ListenerId, _addr: &Multiaddr)

Indicates to the behaviour that we have started listening on a new multiaddr.

fn inject_expired_listen_addr(&mut self, _id: ListenerId, _addr: &Multiaddr)

Indicates to the behaviour that a multiaddr we were listening on has expired, which means that we are no longer listening in it.

fn inject_listener_error(
    &mut self,
    _id: ListenerId,
    _err: &(dyn Error + 'static)
)

A listener experienced an error.

fn inject_listener_closed(
    &mut self,
    _id: ListenerId,
    _reason: Result<(), &Error>
)

A listener closed.

fn inject_new_external_addr(&mut self, _addr: &Multiaddr)

Indicates to the behaviour that we have discovered a new external address for us.

fn inject_expired_external_addr(&mut self, _addr: &Multiaddr)

Indicates to the behaviour that an external address was removed.